present_bk_sun.ppt
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The document provides an overview of the Sun, including its structure and composition. It notes that the Sun is one of approximately 1011 stars in the Milky Way galaxy, located about 30,000 light years from the galactic center. The Sun is composed primarily of hydrogen and helium, and has a mean surface temperature of around 6,000°C. Its internal structure consists of a core, radiative zone, and convective zone with varying temperatures and pressures. Waves present in the Sun's atmosphere are considered an important factor in heating the solar atmosphere.
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1. The Solar System consists of the Sun orbited by 8 planets, dwarf planets, asteroids and comets. A planet orbits the Sun and is massive enough to be spherical, while a moon orbits a planet.
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Astronomy.ppt
Here are potential responses to the questions:
1. The Solar System consists of the Sun orbited by 8 planets, dwarf planets, asteroids and comets. A planet orbits the Sun, is massive enough to be spherical, and has cleared its orbit of smaller objects. A moon orbits a planet.
2. Gravitational field strength is a measure of the strength of gravity. It varies in the Solar System and is greatest near the most massive objects. It is 10 N/kg on Earth but lower on planets farther from the Sun like Mars or Pluto.
3. A comet's orbit is highly elongated rather than nearly circular like planets. Comets move fastest when closest to the Sun due to its stronger gravitational pull.
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The Sun is the largest object in the solar system, containing approximately 98% of the total solar system mass. It is a yellow dwarf main sequence star composed primarily of hydrogen (71%) and helium (27%). The Sun's immense mass and high temperatures at its core (15-25 million degrees Celsius) enable nuclear fusion, converting hydrogen to helium and releasing enormous amounts of energy in the process.
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1. The Solar System consists of the Sun orbited by 8 planets, dwarf planets, asteroids and comets. A planet orbits the Sun and is massive enough to be spherical, while a moon orbits a planet.
2. Gravitational field strength measures the strength of gravity and varies between celestial bodies, being strongest near the most massive objects like the Sun.
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The document provides information about solar energy and the sun. It discusses:
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- Solar radiation that reaches Earth is in the wavelength range of 0.25-3.0 μm. The solar constant, which is the average solar energy received outside Earth's atmosphere, is estimated to be 1367 W/m2.
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Here are potential responses to the questions:
1. The Solar System consists of the Sun orbited by 8 planets, dwarf planets, asteroids and comets. A planet orbits the Sun, is massive enough to be spherical, and has cleared its orbit of smaller objects. A moon orbits a planet.
2. Gravitational field strength is a measure of the strength of gravity. It varies in the Solar System and is greatest near the most massive objects. It is 10 N/kg on Earth but lower on planets farther from the Sun like Mars or Pluto.
3. A comet's orbit is highly elongated rather than nearly circular like planets. Comets move fastest when closest to the Sun due to its stronger gravitational pull.
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The Sun is the largest object in the solar system, containing approximately 98% of the total solar system mass. It is a yellow dwarf main sequence star composed primarily of hydrogen (71%) and helium (27%). The Sun's immense mass and high temperatures at its core (15-25 million degrees Celsius) enable nuclear fusion, converting hydrogen to helium and releasing enormous amounts of energy in the process.
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The document summarizes key facts about the Sun:
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The binding of cosmological structures by massless topological defects
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equations sourced by a topological defect, i.e. a singularity of a very specific form, the result is a localized gravitational
field capable of driving flat rotation (i.e. Keplerian circular orbits at a constant speed for all radii) of test masses on a thin
spherical shell without any underlying mass. Moreover, a large-scale structure which exploits this solution by assembling
concentrically a number of such topological defects can establish a flat stellar or galactic rotation curve, and can also deflect
light in the same manner as an equipotential (isothermal) sphere. Thus, the need for dark matter or modified gravity theory is
mitigated, at least in part.
ESA/ACT Science Coffee: Diego Blas - Gravitational wave detection with orbita...
ESA/ACT Science Coffee: Diego Blas - Gravitational wave detection with orbita...Advanced-Concepts-Team
Presentation in the Science Coffee of the Advanced Concepts Team of the European Space Agency on the 07.06.2024.
Speaker: Diego Blas (IFAE/ICREA)
Title: Gravitational wave detection with orbital motion of Moon and artificial
Abstract:
In this talk I will describe some recent ideas to find gravitational waves from supermassive black holes or of primordial origin by studying their secular effect on the orbital motion of the Moon or satellites that are laser ranged.20240520 Planning a Circuit Simulator in JavaScript.pptx
Evaporation step counter work. I have done a physical experiment.
(Work in progress.)
SAR of Medicinal Chemistry 1st by dk.pdf
In this presentation include the prototype drug SAR on thus or with their examples .
Syllabus of Second Year B. Pharmacy
2019 PATTERN.
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Unlocking the mysteries of reproduction: Exploring fecundity and gonadosomati...
The pygmy halfbeak Dermogenys colletei, is known for its viviparous nature, this presents an intriguing case of relatively low fecundity, raising questions about potential compensatory reproductive strategies employed by this species. Our study delves into the examination of fecundity and the Gonadosomatic Index (GSI) in the Pygmy Halfbeak, D. colletei (Meisner, 2001), an intriguing viviparous fish indigenous to Sarawak, Borneo. We hypothesize that the Pygmy halfbeak, D. colletei, may exhibit unique reproductive adaptations to offset its low fecundity, thus enhancing its survival and fitness. To address this, we conducted a comprehensive study utilizing 28 mature female specimens of D. colletei, carefully measuring fecundity and GSI to shed light on the reproductive adaptations of this species. Our findings reveal that D. colletei indeed exhibits low fecundity, with a mean of 16.76 ± 2.01, and a mean GSI of 12.83 ± 1.27, providing crucial insights into the reproductive mechanisms at play in this species. These results underscore the existence of unique reproductive strategies in D. colletei, enabling its adaptation and persistence in Borneo's diverse aquatic ecosystems, and call for further ecological research to elucidate these mechanisms. This study lends to a better understanding of viviparous fish in Borneo and contributes to the broader field of aquatic ecology, enhancing our knowledge of species adaptations to unique ecological challenges.
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ESPP presentation to EU Waste Water Network, 4th June 2024 “EU policies driving nutrient removal and recycling
and the revised UWWTD (Urban Waste Water Treatment Directive)”
Equivariant neural networks and representation theory
Or: Beyond linear.
Abstract: Equivariant neural networks are neural networks that incorporate symmetries. The nonlinear activation functions in these networks result in interesting nonlinear equivariant maps between simple representations, and motivate the key player of this talk: piecewise linear representation theory.
Disclaimer: No one is perfect, so please mind that there might be mistakes and typos.
dtubbenhauer@gmail.com
Corrected slides: dtubbenhauer.com/talks.html
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present_bk_sun.ppt
- 1. An overview of The Sun Dr. Kumthekar Bhagvat Keshavrao Assistant Professor & Head, Department of Physics, Nutan Mahavidyalaya, sailu, Dist: Parbhani – 431 503 (MS) E-mail: bkumthekar@gmail.com
- 2. Our galaxy Milky Way is one of them Group of galaxies A group of stars is known as Galaxy Universe is made up of billions of galaxies
- 3. Milky Way has about 1011 stars Stars move inside a galaxy Milky Way Our sun is one of them at 30,000 light years from the centre of Milky Way
- 4. It is the nearest star to us Distance between Sun and earth is 150 million km; Light takes 8 m 20 s from the Sun to earth Sun – Our Star Spectral type → G2V; G2 stands for spectral classification of stars having the surface temperature between 4500 − 6000 K and V for Luminosity classification of star.
- 5. • Sun rotates from west to east and its equator makes an angle of about 7o with the ecliptic Sun does not rotate like a solid body It rotates like gaseous body means different speed at different positions. Speed of rotation is max (rotational period of about 25 days) near the equator and min (rotational period of about 35 days) near the poles.
- 6. General structure of the Sun • If a photon comes out straight from the core it takes 2 sec, but it undergoes many reflections and takes time of ~106 years to travel from core to the photosphere. The variation of temperature and pressure in solar interior is as the following. Sun Statistics Mass (kg) 1.989x10 30 Mass (Earth = 1) 332,830 Equatorial radius (km) 695,000 Equatorial radius (Earth = 1) 108.97 Mean density (gm/cm^3) 1.410 Rotational period (days) 25-36* Escape velocity (km/sec) 618.02 Luminosity (ergs/sec) 3.827x10 33 Magnitude (Vo) -26.8 Mean surface temperature 6,000°C Age (billion years) 4.5 Hydrogen Helium Oxygen Carbon Nitrogen Neon Iron Silicon Magnesium Sulfur All others 92.1% 7.8% 0.061% 0.030% 0.0084% 0.0076% 0.0037% 0.0031% 0.0024% 0.0015% 0.0015%
- 8. Corona: Corona emits lines of highly ionized ions e.g., Fe XIV or more. Mechanism responsible for high temperature is under debate. • The atmosphere consist of three regions namely, 1. Photosphere 2. Chromosphere 3. Corona T ≈ 6000 K T ≈ 4000 K T ≈ 2 x 106 K
- 9. Variation of temperature and density in solar atmosphere Waves are always present in the atmosphere of the Sun, because the Sun is a dynamic body.
- 10. Some conclusions: • The Sun is a dynamic body, so that the waves are always present in the Sun and its atmosphere. • Waves are very important in the solar atmosphere and throughout the cosmos. • They are also considered as prime candidate for heating the solar atmosphere.
- 11. Thank you … Dr Ratnesh Singh sir Director, UGC- HRDC-GGV Koni, Bilaspur, Dr. C. S. Wazalwar sir Course Cordinator, Dr. Sambit Padhi & Dr. Jyoti Verma Mam Assistant Course Cordinators and all staff member of HRDC-GGV Koni, Bilaspur All participants …