Chemistry Changes Around Us Grade 5 to 6
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In this u can learn about all the types of water and changes around us This is for grade 4-6 Click *here for free download
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Changes in matter.pptx 20013 2014
This document discusses physical and chemical changes in matter. It provides examples of physical changes such as melting, freezing, evaporation and condensation. Chemical changes result in new substances forming, like rusting, burning, and cooking. The key questions are how matter changes and the importance of understanding matter's properties and types. The objectives are to analyze how matter changes physically and chemically, and demonstrate ways matter undergoes property changes.
physical and chemical property and physical and chemical change
The document defines physical and chemical properties and changes. It states that physical properties can be observed without changing the substance's composition, and includes intensive properties that do not depend on amount and extensive properties that do. Chemical properties describe a substance's ability to change into a new substance through a chemical reaction. The document distinguishes between physical changes, which alter a substance's state or form without creating a new substance, and chemical changes, which produce new substances and are generally not reversible through physical processes alone.
Chapter 2 physical and chemical change
Changes can be classified in several ways, including whether they are reversible or irreversible, desirable or undesirable, and physical or chemical. Reversible changes can be undone by changing conditions back, while irreversible changes form new substances. Desirable changes are useful, like digestion, while undesirable changes are harmful, like rusting. Physical changes alter a substance's properties but not its chemical makeup, through processes like melting, freezing, and dissolving. Chemical changes create new substances through chemical reactions like burning and fermentation. Chemical changes also involve changes in mass or energy absorption/release.
BEd SCIENCE FILE COMPLETE FULL TOPIC OF CLASS 8TH
Physical changes alter a substance's physical properties like state, color, or odor without changing its chemical makeup. Examples include melting ice and blowing up a balloon. Chemical changes create new substances through irreversible reactions, such as ripening fruit that transforms its chemical structure. The document aims to differentiate and provide examples of physical and chemical changes.
Physical and chemical changes
This document discusses physical and chemical changes. It defines physical changes as changes in a substance's appearance or state without producing a new substance. Chemical changes produce new substances through chemical reactions. Examples of each type of change are provided, along with activities and demonstrations to illustrate the differences between physical and chemical changes. Key terms related to changes in matter are also defined.
Changes in matter.pptx 20013 2014 ( Physical and chemical change)
This document discusses physical and chemical changes in matter. It begins by outlining key questions about how matter changes and objectives to analyze how matter changes physically and chemically. It then provides examples of physical changes like tearing paper, folding a handkerchief, and mixtures. Chemical changes form new substances, like rusting iron or souring milk. Finally, it defines physical changes as changes in size, shape or appearance without new substances, while chemical changes result in new substances and altered properties.
Changes in matter.pptx 20013 2014
This document discusses physical and chemical changes in matter. It begins by outlining key questions about how matter changes and objectives to analyze how matter changes physically and chemically. Examples of physical changes discussed include tearing paper, molding clay, and folding a handkerchief. Chemical changes discussed include rusting iron, souring milk, and ripening fruits. A physical change alters the appearance of matter but does not change its chemical composition, while a chemical change produces new substances. The document seeks to demonstrate the difference between physical and chemical changes in various examples and situations.
HUDA PPT 3.pptx
This document discusses the differences between physical and chemical changes of matter. It defines physical changes as changes in shape, size, or state that do not alter the chemical makeup of a substance. Chemical changes occur when substances combine to form new substances with different chemical properties. The learning objectives are to identify physical and chemical changes and compare their key differences.
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Changes in matter.pptx 20013 2014
This document discusses physical and chemical changes in matter. It provides examples of physical changes such as melting, freezing, evaporation and condensation. Chemical changes result in new substances forming, like rusting, burning, and cooking. The key questions are how matter changes and the importance of understanding matter's properties and types. The objectives are to analyze how matter changes physically and chemically, and demonstrate ways matter undergoes property changes.
physical and chemical property and physical and chemical change
The document defines physical and chemical properties and changes. It states that physical properties can be observed without changing the substance's composition, and includes intensive properties that do not depend on amount and extensive properties that do. Chemical properties describe a substance's ability to change into a new substance through a chemical reaction. The document distinguishes between physical changes, which alter a substance's state or form without creating a new substance, and chemical changes, which produce new substances and are generally not reversible through physical processes alone.
Chapter 2 physical and chemical change
Changes can be classified in several ways, including whether they are reversible or irreversible, desirable or undesirable, and physical or chemical. Reversible changes can be undone by changing conditions back, while irreversible changes form new substances. Desirable changes are useful, like digestion, while undesirable changes are harmful, like rusting. Physical changes alter a substance's properties but not its chemical makeup, through processes like melting, freezing, and dissolving. Chemical changes create new substances through chemical reactions like burning and fermentation. Chemical changes also involve changes in mass or energy absorption/release.
BEd SCIENCE FILE COMPLETE FULL TOPIC OF CLASS 8TH
Physical changes alter a substance's physical properties like state, color, or odor without changing its chemical makeup. Examples include melting ice and blowing up a balloon. Chemical changes create new substances through irreversible reactions, such as ripening fruit that transforms its chemical structure. The document aims to differentiate and provide examples of physical and chemical changes.
Physical and chemical changes
This document discusses physical and chemical changes. It defines physical changes as changes in a substance's appearance or state without producing a new substance. Chemical changes produce new substances through chemical reactions. Examples of each type of change are provided, along with activities and demonstrations to illustrate the differences between physical and chemical changes. Key terms related to changes in matter are also defined.
Changes in matter.pptx 20013 2014 ( Physical and chemical change)
This document discusses physical and chemical changes in matter. It begins by outlining key questions about how matter changes and objectives to analyze how matter changes physically and chemically. It then provides examples of physical changes like tearing paper, folding a handkerchief, and mixtures. Chemical changes form new substances, like rusting iron or souring milk. Finally, it defines physical changes as changes in size, shape or appearance without new substances, while chemical changes result in new substances and altered properties.
Changes in matter.pptx 20013 2014
This document discusses physical and chemical changes in matter. It begins by outlining key questions about how matter changes and objectives to analyze how matter changes physically and chemically. Examples of physical changes discussed include tearing paper, molding clay, and folding a handkerchief. Chemical changes discussed include rusting iron, souring milk, and ripening fruits. A physical change alters the appearance of matter but does not change its chemical composition, while a chemical change produces new substances. The document seeks to demonstrate the difference between physical and chemical changes in various examples and situations.
HUDA PPT 3.pptx
This document discusses the differences between physical and chemical changes of matter. It defines physical changes as changes in shape, size, or state that do not alter the chemical makeup of a substance. Chemical changes occur when substances combine to form new substances with different chemical properties. The learning objectives are to identify physical and chemical changes and compare their key differences.
PHYSICAL AND CHEMICAL CHANGE
This document discusses the differences between physical and chemical changes. Physical changes can be easily undone and do not change the substance's composition, though the substance's state or the arrangement of its molecules may change. Chemical changes result in a new substance through molecular rearrangement and cannot be easily reversed. Examples of physical changes include breaking or cutting an object, while examples of chemical changes include burning wood or digesting food.
Module 7_Differentiating physical and chemical change.pptx
This document discusses the differences between physical and chemical changes. Physical changes alter a substance's physical properties, like shape or state, without changing its chemical composition. Examples include melting, freezing, cutting, and bending. Chemical changes produce new substances through chemical reactions that alter a substance's chemical makeup, like burning sugar or rotting fruit. Chemical changes are irreversible, while many physical changes can be reversed. Signs of a physical change include alterations in shape, state, or other properties, while signs of a chemical change involve changes in color, temperature, light/gas production, or taste.
Physical and chemical change
This document discusses the difference between physical and chemical changes. Physical changes involve alterations to a substance's physical properties like size, shape, or phase without changing its chemical composition. Examples given are melting ice, tearing paper, and blowing a balloon. Physical changes are reversible. Chemical changes result in new substances forming with different chemical compositions and properties. Examples of chemical changes include rusting iron, burning paper, and ripening fruits. Chemical changes are irreversible.
Class 9 [Solution]
This document defines solutions and the different types of solutions based on the amount of solute present: saturated, unsaturated, and supersaturated. It also discusses concentration of solutions and solubility. Physical changes are described as temporary alterations to a substance's physical properties that do not change its composition or mass, and are reversible. Chemical changes permanently transform substances into new products with different properties, and are irreversible. Examples of each type of change are provided.
Density Common Chemical Changes Q And A
This document discusses physical and chemical properties and changes in matter. It provides examples of physical properties including state, size, mass, density, and magnetic properties. Examples of physical changes include changes in state, dissolving, and changes in shape. Chemical properties include ability to burn and examples of chemical changes are burning and rusting. The document also discusses signs that a chemical change has occurred such as release of energy, change in odor or color, and formation of gases or solids.
Physical and Chemical Changes_Introduction.ppt
1. Physical changes alter a substance's physical properties like state of matter, shape, or size without changing its chemical composition. They include phase changes like melting, freezing, evaporation, and condensation caused by adding or removing energy.
2. Chemical changes create new substances with different chemical compositions through chemical reactions. Signs include fizzing, color changes, heat/light production, odor, and precipitate formation. Examples are burning, cooking, rusting, and combining baking soda and vinegar.
3. Phase changes between solids, liquids, and gases that do not alter chemical makeup, like melting ice or evaporating water, are physical not chemical changes.
1/11/12
A physical change alters a substance's physical properties but not its chemical identity, while a chemical change transforms a substance into different substances through breaking or forming of chemical bonds. Changes in color, mass, or release of gases indicate a chemical change has occurred, whereas changes in state or phase without a new substance forming signal a physical change. Students can identify if a change is physical or chemical based on observable evidence like changes in properties or formation of new substances.
Changes in matter- Science Grade 4
In this lesson you will learn the physical change and chemical change are changes happened in matter.
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Unit b matter and chemical change notes(physical & chemical changes)
Physical changes alter a substance's state but not its chemical composition, allowing separation back into original substances like melting ice cream. Chemical changes form new substances that are different from reactants, identified by a change in color, odor, formation of solids or gases, or release of energy like light and heat. Physical and chemical changes are distinguished by whether the original substances can be recovered after the change.
Changes in materials
This document defines key terms and discusses physical and chemical changes in matter. It defines porosity, density, and biodegradability. Physical changes alter a material's appearance through processes like bending, cutting, and melting, which change size and shape but not composition. Chemical changes produce new substances through chemical reactions like burning and rusting. The document provides examples of physical changes like phase changes and chemical changes like cooking and provides a review questions to test the reader's understanding.
Physical chemical-changes
A physical change alters a substance's physical properties temporarily without changing its chemical composition. Characteristics include no new substances are formed, the chemical composition does not change, and the change can be reversed. A chemical change results in one or more new substances forming with different properties and compositions compared to the original. Characteristics include new substances are formed, the original composition changes completely, and the change is permanent and irreversible. Types of changes include slow vs. fast, natural vs. man-made, periodic vs. non-periodic, and reversible vs. irreversible.
Physical Or Chemical Change Qz
Physical changes are changes that do not result in a new substance and can sometimes be reversed, such as melting, freezing, breaking, and cutting. Chemical changes result in new substances through chemical reactions, such as burning, digestion, and rusting, and cannot be reversed. The document provides examples of both physical and chemical changes and discusses their distinguishing properties.
CHANGES AROUND US (SCIENCE CLASS VI)
Let us now try and define change for the purpose of science. We can define it as an act by which a thing forms or becomes different than its previous self. For instance, when ice melts, it changes into water. Therefore it turns its form from solid to liquid.
Physical and chemical properties ppt
Physical properties describe a substance without changing its chemical makeup, such as state of matter, shape, or texture. Chemical properties describe a substance's reactivity and ability to change into different substances through chemical reactions like burning or corrosion. Some key physical properties include melting, freezing, and breaking, while important chemical properties involve flammability and reactivity with other materials through combustion or other reactions.
changesinmatter-grade5-210913084450 (1).pptx
1. The document discusses the 5 R's of waste management: reducing, reusing, recycling, repairing, and recovering.
2. It describes different types of physical changes that matter can undergo, such as changes in size, shape, phase changes like melting, freezing, and evaporation.
3. Chemical changes result in a new substance being formed, with different properties from the original, through processes like cooking, burning, rusting, and the release of gases.
Physical change or chemical change
A physical change is reversible and does not alter the chemical composition of a substance. Examples include water changing between liquid, solid, and gas states or wood being shaped into a baseball bat, as it remains chemically wood. A chemical change is irreversible and produces substances with different chemical compositions, such as wood burning to ash or bread toasting. Some changes can be either physical or chemical depending on conditions, and determining the type of change may require microscopic examination, with chemical changes generally producing substances that cannot be changed back to their original form.
Physical change or chemical change
A physical change is reversible and does not alter the chemical composition of a substance. Examples include water changing between liquid, solid, and gas states or wood being shaped into a baseball bat, as it remains chemically wood. A chemical change is irreversible and produces substances with different chemical compositions than the original, such as wood burning to ash or bread toasting. Some changes can be either physical or chemical depending on conditions, and determining the type of change may require microscopic examination, with an irreversible change generally indicating a chemical process occurred.
Physical change or chemical change
A physical change is reversible and does not alter the chemical composition of a substance. Examples include water changing between liquid, solid, and gas states or wood being shaped into a baseball bat, as it remains chemically wood. A chemical change is irreversible and produces substances with different chemical compositions, such as wood burning to ash or bread toasting. Some changes can be either physical or chemical depending on conditions, and determining the type of change may require microscopic examination, with chemical changes generally producing substances that cannot be changed back to their original form.
Physical change.pptx
Physical change refers to a change in which no new substances are formed and can generally be reversed by changing conditions back. Characteristics of a physical change include that no new substance is formed, the change is reversible, the chemical properties remain the same, and changes may occur in color, shape, size or state with no energy liberated. Water is provided as a simple example, as it can exist in three physical states - solid (ice), liquid, and gas (steam) - through physical changes between each state that meet the characteristics.
SDSS1335+0728: The awakening of a ∼ 106M⊙ black hole⋆
Context. The early-type galaxy SDSS J133519.91+072807.4 (hereafter SDSS1335+0728), which had exhibited no prior optical variations during the preceding two decades, began showing significant nuclear variability in the Zwicky Transient Facility (ZTF) alert stream from December 2019 (as ZTF19acnskyy). This variability behaviour, coupled with the host-galaxy properties, suggests that SDSS1335+0728 hosts a ∼ 106M⊙ black hole (BH) that is currently in the process of ‘turning on’. Aims. We present a multi-wavelength photometric analysis and spectroscopic follow-up performed with the aim of better understanding the origin of the nuclear variations detected in SDSS1335+0728. Methods. We used archival photometry (from WISE, 2MASS, SDSS, GALEX, eROSITA) and spectroscopic data (from SDSS and LAMOST) to study the state of SDSS1335+0728 prior to December 2019, and new observations from Swift, SOAR/Goodman, VLT/X-shooter, and Keck/LRIS taken after its turn-on to characterise its current state. We analysed the variability of SDSS1335+0728 in the X-ray/UV/optical/mid-infrared range, modelled its spectral energy distribution prior to and after December 2019, and studied the evolution of its UV/optical spectra. Results. From our multi-wavelength photometric analysis, we find that: (a) since 2021, the UV flux (from Swift/UVOT observations) is four times brighter than the flux reported by GALEX in 2004; (b) since June 2022, the mid-infrared flux has risen more than two times, and the W1−W2 WISE colour has become redder; and (c) since February 2024, the source has begun showing X-ray emission. From our spectroscopic follow-up, we see that (i) the narrow emission line ratios are now consistent with a more energetic ionising continuum; (ii) broad emission lines are not detected; and (iii) the [OIII] line increased its flux ∼ 3.6 years after the first ZTF alert, which implies a relatively compact narrow-line-emitting region. Conclusions. We conclude that the variations observed in SDSS1335+0728 could be either explained by a ∼ 106M⊙ AGN that is just turning on or by an exotic tidal disruption event (TDE). If the former is true, SDSS1335+0728 is one of the strongest cases of an AGNobserved in the process of activating. If the latter were found to be the case, it would correspond to the longest and faintest TDE ever observed (or another class of still unknown nuclear transient). Future observations of SDSS1335+0728 are crucial to further understand its behaviour. Key words. galaxies: active– accretion, accretion discs– galaxies: individual: SDSS J133519.91+072807.4
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PHYSICAL AND CHEMICAL CHANGE
This document discusses the differences between physical and chemical changes. Physical changes can be easily undone and do not change the substance's composition, though the substance's state or the arrangement of its molecules may change. Chemical changes result in a new substance through molecular rearrangement and cannot be easily reversed. Examples of physical changes include breaking or cutting an object, while examples of chemical changes include burning wood or digesting food.
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This document discusses the differences between physical and chemical changes. Physical changes alter a substance's physical properties, like shape or state, without changing its chemical composition. Examples include melting, freezing, cutting, and bending. Chemical changes produce new substances through chemical reactions that alter a substance's chemical makeup, like burning sugar or rotting fruit. Chemical changes are irreversible, while many physical changes can be reversed. Signs of a physical change include alterations in shape, state, or other properties, while signs of a chemical change involve changes in color, temperature, light/gas production, or taste.
Physical and chemical change
This document discusses the difference between physical and chemical changes. Physical changes involve alterations to a substance's physical properties like size, shape, or phase without changing its chemical composition. Examples given are melting ice, tearing paper, and blowing a balloon. Physical changes are reversible. Chemical changes result in new substances forming with different chemical compositions and properties. Examples of chemical changes include rusting iron, burning paper, and ripening fruits. Chemical changes are irreversible.
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This document defines solutions and the different types of solutions based on the amount of solute present: saturated, unsaturated, and supersaturated. It also discusses concentration of solutions and solubility. Physical changes are described as temporary alterations to a substance's physical properties that do not change its composition or mass, and are reversible. Chemical changes permanently transform substances into new products with different properties, and are irreversible. Examples of each type of change are provided.
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This document discusses physical and chemical properties and changes in matter. It provides examples of physical properties including state, size, mass, density, and magnetic properties. Examples of physical changes include changes in state, dissolving, and changes in shape. Chemical properties include ability to burn and examples of chemical changes are burning and rusting. The document also discusses signs that a chemical change has occurred such as release of energy, change in odor or color, and formation of gases or solids.
Physical and Chemical Changes_Introduction.ppt
1. Physical changes alter a substance's physical properties like state of matter, shape, or size without changing its chemical composition. They include phase changes like melting, freezing, evaporation, and condensation caused by adding or removing energy.
2. Chemical changes create new substances with different chemical compositions through chemical reactions. Signs include fizzing, color changes, heat/light production, odor, and precipitate formation. Examples are burning, cooking, rusting, and combining baking soda and vinegar.
3. Phase changes between solids, liquids, and gases that do not alter chemical makeup, like melting ice or evaporating water, are physical not chemical changes.
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A physical change alters a substance's physical properties but not its chemical identity, while a chemical change transforms a substance into different substances through breaking or forming of chemical bonds. Changes in color, mass, or release of gases indicate a chemical change has occurred, whereas changes in state or phase without a new substance forming signal a physical change. Students can identify if a change is physical or chemical based on observable evidence like changes in properties or formation of new substances.
Changes in matter- Science Grade 4
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Unit b matter and chemical change notes(physical & chemical changes)
Physical changes alter a substance's state but not its chemical composition, allowing separation back into original substances like melting ice cream. Chemical changes form new substances that are different from reactants, identified by a change in color, odor, formation of solids or gases, or release of energy like light and heat. Physical and chemical changes are distinguished by whether the original substances can be recovered after the change.
Changes in materials
This document defines key terms and discusses physical and chemical changes in matter. It defines porosity, density, and biodegradability. Physical changes alter a material's appearance through processes like bending, cutting, and melting, which change size and shape but not composition. Chemical changes produce new substances through chemical reactions like burning and rusting. The document provides examples of physical changes like phase changes and chemical changes like cooking and provides a review questions to test the reader's understanding.
Physical chemical-changes
A physical change alters a substance's physical properties temporarily without changing its chemical composition. Characteristics include no new substances are formed, the chemical composition does not change, and the change can be reversed. A chemical change results in one or more new substances forming with different properties and compositions compared to the original. Characteristics include new substances are formed, the original composition changes completely, and the change is permanent and irreversible. Types of changes include slow vs. fast, natural vs. man-made, periodic vs. non-periodic, and reversible vs. irreversible.
Physical Or Chemical Change Qz
Physical changes are changes that do not result in a new substance and can sometimes be reversed, such as melting, freezing, breaking, and cutting. Chemical changes result in new substances through chemical reactions, such as burning, digestion, and rusting, and cannot be reversed. The document provides examples of both physical and chemical changes and discusses their distinguishing properties.
CHANGES AROUND US (SCIENCE CLASS VI)
Let us now try and define change for the purpose of science. We can define it as an act by which a thing forms or becomes different than its previous self. For instance, when ice melts, it changes into water. Therefore it turns its form from solid to liquid.
Physical and chemical properties ppt
Physical properties describe a substance without changing its chemical makeup, such as state of matter, shape, or texture. Chemical properties describe a substance's reactivity and ability to change into different substances through chemical reactions like burning or corrosion. Some key physical properties include melting, freezing, and breaking, while important chemical properties involve flammability and reactivity with other materials through combustion or other reactions.
changesinmatter-grade5-210913084450 (1).pptx
1. The document discusses the 5 R's of waste management: reducing, reusing, recycling, repairing, and recovering.
2. It describes different types of physical changes that matter can undergo, such as changes in size, shape, phase changes like melting, freezing, and evaporation.
3. Chemical changes result in a new substance being formed, with different properties from the original, through processes like cooking, burning, rusting, and the release of gases.
Physical change or chemical change
A physical change is reversible and does not alter the chemical composition of a substance. Examples include water changing between liquid, solid, and gas states or wood being shaped into a baseball bat, as it remains chemically wood. A chemical change is irreversible and produces substances with different chemical compositions, such as wood burning to ash or bread toasting. Some changes can be either physical or chemical depending on conditions, and determining the type of change may require microscopic examination, with chemical changes generally producing substances that cannot be changed back to their original form.
Physical change or chemical change
A physical change is reversible and does not alter the chemical composition of a substance. Examples include water changing between liquid, solid, and gas states or wood being shaped into a baseball bat, as it remains chemically wood. A chemical change is irreversible and produces substances with different chemical compositions than the original, such as wood burning to ash or bread toasting. Some changes can be either physical or chemical depending on conditions, and determining the type of change may require microscopic examination, with an irreversible change generally indicating a chemical process occurred.
Physical change or chemical change
A physical change is reversible and does not alter the chemical composition of a substance. Examples include water changing between liquid, solid, and gas states or wood being shaped into a baseball bat, as it remains chemically wood. A chemical change is irreversible and produces substances with different chemical compositions, such as wood burning to ash or bread toasting. Some changes can be either physical or chemical depending on conditions, and determining the type of change may require microscopic examination, with chemical changes generally producing substances that cannot be changed back to their original form.
Physical change.pptx
Physical change refers to a change in which no new substances are formed and can generally be reversed by changing conditions back. Characteristics of a physical change include that no new substance is formed, the change is reversible, the chemical properties remain the same, and changes may occur in color, shape, size or state with no energy liberated. Water is provided as a simple example, as it can exist in three physical states - solid (ice), liquid, and gas (steam) - through physical changes between each state that meet the characteristics.
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Module 7_Differentiating physical and chemical change.pptx
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SDSS1335+0728: The awakening of a ∼ 106M⊙ black hole⋆
Context. The early-type galaxy SDSS J133519.91+072807.4 (hereafter SDSS1335+0728), which had exhibited no prior optical variations during the preceding two decades, began showing significant nuclear variability in the Zwicky Transient Facility (ZTF) alert stream from December 2019 (as ZTF19acnskyy). This variability behaviour, coupled with the host-galaxy properties, suggests that SDSS1335+0728 hosts a ∼ 106M⊙ black hole (BH) that is currently in the process of ‘turning on’. Aims. We present a multi-wavelength photometric analysis and spectroscopic follow-up performed with the aim of better understanding the origin of the nuclear variations detected in SDSS1335+0728. Methods. We used archival photometry (from WISE, 2MASS, SDSS, GALEX, eROSITA) and spectroscopic data (from SDSS and LAMOST) to study the state of SDSS1335+0728 prior to December 2019, and new observations from Swift, SOAR/Goodman, VLT/X-shooter, and Keck/LRIS taken after its turn-on to characterise its current state. We analysed the variability of SDSS1335+0728 in the X-ray/UV/optical/mid-infrared range, modelled its spectral energy distribution prior to and after December 2019, and studied the evolution of its UV/optical spectra. Results. From our multi-wavelength photometric analysis, we find that: (a) since 2021, the UV flux (from Swift/UVOT observations) is four times brighter than the flux reported by GALEX in 2004; (b) since June 2022, the mid-infrared flux has risen more than two times, and the W1−W2 WISE colour has become redder; and (c) since February 2024, the source has begun showing X-ray emission. From our spectroscopic follow-up, we see that (i) the narrow emission line ratios are now consistent with a more energetic ionising continuum; (ii) broad emission lines are not detected; and (iii) the [OIII] line increased its flux ∼ 3.6 years after the first ZTF alert, which implies a relatively compact narrow-line-emitting region. Conclusions. We conclude that the variations observed in SDSS1335+0728 could be either explained by a ∼ 106M⊙ AGN that is just turning on or by an exotic tidal disruption event (TDE). If the former is true, SDSS1335+0728 is one of the strongest cases of an AGNobserved in the process of activating. If the latter were found to be the case, it would correspond to the longest and faintest TDE ever observed (or another class of still unknown nuclear transient). Future observations of SDSS1335+0728 are crucial to further understand its behaviour. Key words. galaxies: active– accretion, accretion discs– galaxies: individual: SDSS J133519.91+072807.4
Mapping the Growth of Supermassive Black Holes as a Function of Galaxy Stella...
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Anti-Universe And Emergent Gravity and the Dark Universe
Recent theoretical progress indicates that spacetime and gravity emerge together from the entanglement structure of an underlying microscopic theory. These ideas are best understood in Anti-de Sitter space, where they rely on the area law for entanglement entropy. The extension to de Sitter space requires taking into account the entropy and temperature associated with the cosmological horizon. Using insights from string theory, black hole physics and quantum information theory we argue that the positive dark energy leads to a thermal volume law contribution to the entropy that overtakes the area law precisely at the cosmological horizon. Due to the competition between area and volume law entanglement the microscopic de Sitter states do not thermalise at sub-Hubble scales: they exhibit memory effects in the form of an entropy displacement caused by matter. The emergent laws of gravity contain an additional ‘dark’ gravitational force describing the ‘elastic’ response due to the entropy displacement. We derive an estimate of the strength of this extra force in terms of the baryonic mass, Newton’s constant and the Hubble acceleration scale a0 = cH0, and provide evidence for the fact that this additional ‘dark gravity force’ explains the observed phenomena in galaxies and clusters currently attributed to dark matter.
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TOPIC OF DISCUSSION: CENTRIFUGATION SLIDESHARE.pptx
Centrifugation is a powerful technique used in laboratories to separate components of a heterogeneous mixture based on their density. This process utilizes centrifugal force to rapidly spin samples, causing denser particles to migrate outward more quickly than lighter ones. As a result, distinct layers form within the sample tube, allowing for easy isolation and purification of target substances.
Compositions of iron-meteorite parent bodies constrainthe structure of the pr...
Magmatic iron-meteorite parent bodies are the earliest planetesimals in the Solar System,and they preserve information about conditions and planet-forming processes in thesolar nebula. In this study, we include comprehensive elemental compositions andfractional-crystallization modeling for iron meteorites from the cores of five differenti-ated asteroids from the inner Solar System. Together with previous results of metalliccores from the outer Solar System, we conclude that asteroidal cores from the outerSolar System have smaller sizes, elevated siderophile-element abundances, and simplercrystallization processes than those from the inner Solar System. These differences arerelated to the formation locations of the parent asteroids because the solar protoplane-tary disk varied in redox conditions, elemental distributions, and dynamics at differentheliocentric distances. Using highly siderophile-element data from iron meteorites, wereconstruct the distribution of calcium-aluminum-rich inclusions (CAIs) across theprotoplanetary disk within the first million years of Solar-System history. CAIs, the firstsolids to condense in the Solar System, formed close to the Sun. They were, however,concentrated within the outer disk and depleted within the inner disk. Future modelsof the structure and evolution of the protoplanetary disk should account for this dis-tribution pattern of CAIs.
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Hariyalikart Case Study of helping farmers in Bihar
Helping farmers all across India through our latest technologies of modern farming like drones for irrigation and best pest control For more visit : https://www.hariyalikart.com/case-study
Candidate young stellar objects in the S-cluster: Kinematic analysis of a sub...
Context. The observation of several L-band emission sources in the S cluster has led to a rich discussion of their nature. However, a definitive answer to the classification of the dusty objects requires an explanation for the detection of compact Doppler-shifted Brγ emission. The ionized hydrogen in combination with the observation of mid-infrared L-band continuum emission suggests that most of these sources are embedded in a dusty envelope. These embedded sources are part of the S-cluster, and their relationship to the S-stars is still under debate. To date, the question of the origin of these two populations has been vague, although all explanations favor migration processes for the individual cluster members. Aims. This work revisits the S-cluster and its dusty members orbiting the supermassive black hole SgrA* on bound Keplerian orbits from a kinematic perspective. The aim is to explore the Keplerian parameters for patterns that might imply a nonrandom distribution of the sample. Additionally, various analytical aspects are considered to address the nature of the dusty sources. Methods. Based on the photometric analysis, we estimated the individual H−K and K−L colors for the source sample and compared the results to known cluster members. The classification revealed a noticeable contrast between the S-stars and the dusty sources. To fit the flux-density distribution, we utilized the radiative transfer code HYPERION and implemented a young stellar object Class I model. We obtained the position angle from the Keplerian fit results; additionally, we analyzed the distribution of the inclinations and the longitudes of the ascending node. Results. The colors of the dusty sources suggest a stellar nature consistent with the spectral energy distribution in the near and midinfrared domains. Furthermore, the evaporation timescales of dusty and gaseous clumps in the vicinity of SgrA* are much shorter ( 2yr) than the epochs covered by the observations (≈15yr). In addition to the strong evidence for the stellar classification of the D-sources, we also find a clear disk-like pattern following the arrangements of S-stars proposed in the literature. Furthermore, we find a global intrinsic inclination for all dusty sources of 60 ± 20◦, implying a common formation process. Conclusions. The pattern of the dusty sources manifested in the distribution of the position angles, inclinations, and longitudes of the ascending node strongly suggests two different scenarios: the main-sequence stars and the dusty stellar S-cluster sources share a common formation history or migrated with a similar formation channel in the vicinity of SgrA*. Alternatively, the gravitational influence of SgrA* in combination with a massive perturber, such as a putative intermediate mass black hole in the IRS 13 cluster, forces the dusty objects and S-stars to follow a particular orbital arrangement. Key words. stars: black holes– stars: formation– Galaxy: center– galaxies: star formation
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ABSTRACT
The J'BaFofi, or "Giant Spider," is a mainly legendary arachnid by reportedly inhabiting the dense rain forests of
the Congo. As despite numerous anecdotal accounts and cultural references, the scientific validation remains more elusive.
My study aims to proper evaluate the existence of the J'BaFofi through the analysis of historical reports,indigenous
testimonies and modern exploration efforts.
Post translation modification by Suyash Garg
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Chemistry Changes Around Us Grade 5 to 6
- 1. CHAPTER 06- CHANGES AROUND US UNIT 02 MATERIALS INTRODUCTION TO CHAPTER TYPES OF CHANGES Changes taking place around us can be of 2 types – reversible change and irreversible change Reversible change – Is the change which can be reversed back to its initial state , This is called Reversible change Some examples of reversible change are given below;
- 2. TYPES OF CHANGES Irreversible change – Is the change which can’t be reversed back to its initial state , This is called Irreversible change EXAMPLES OF Irreversible change is : 1) Ripening of fruits 2) Cooking Of food 3) Burning of Wood 4) Growing of Plants and animals
- 3. Changes which take place around us can be classified into 2 depending upon whether a new substance is formed or not. PHYSICAL CHANGE physical change is this change in which no new substance is formed Chemical change is this change in which new substance is formed Possessing the properties that are different from original substances the change only undergoes a change in its size , shape , appearance CHEMICAL CHANGE
- 4. EXAMPLE OF PHYSICAL CHANGE Freezing of water : Water can easily be frozen into ice , Only its state changes when it becomes a solid to liquid Tearing A Paper : Tearing a paper changes its shape and size but the molecules of paper remains the same Burning of paper : Wood and other fuels burning on paper , wood and other fuels like petrol diesel et.. Are all chemical changes as new substance is formed in this substances when burning EXAMPLE OF CHEMICAL CHANGE Tearing a paper
- 5. FACTORS AFFECTING CHANGES 1) HEATING HEATING IS ONE OF THE MOST CONDITION REQUIRED FOR CHANGE TO TAKE PLACE . MELTING OF ICE , EVAPORATION OF WATER , COOKING OF FOOD , BURNING OF PAPER OR WOOD ETC… ARE BOTH PHYSICAL AND CHEMICAL CHANGE , WHICH TAKES PLACE ONLY WHEN THE ORIGINAL SUBSTANCE ARE HEATED . 2) MIXING SOLUTIONS OF DIFFERENT SUBSTANCES MIXING SOLUTIONS OF DIFFERENT SUBSTANCE MAY RESULT IN THE FORMATION OF NEW SUBSTANCE OR CHEMICAL CHANGE
- 8. END