watch video lec of this ppt
https://www.youtube.com/channel/UC7wyHCjg14GieFQmgf3CHCQ
energy types
potential energy
kinetci ebergy
thier equations
mathematical forms
equation derivation
numerical problem on kinetic and potential energy
concept of energy
class 9
o level
Chemists divide energy into two classes. Kinetic energy is energy possessed by an object in motion. The earth revolving around the sun, you walking down the street, and molecules moving in space all have kinetic energy.
Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: K.E. = 1/2 m v2. If the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared. Kinetic energy is usually measured in units of Joules (J); one Joule is equal to 1 kg m2 / s2.
watch video lec of this ppt
https://www.youtube.com/channel/UC7wyHCjg14GieFQmgf3CHCQ
energy types
potential energy
kinetci ebergy
thier equations
mathematical forms
equation derivation
numerical problem on kinetic and potential energy
concept of energy
class 9
o level
Chemists divide energy into two classes. Kinetic energy is energy possessed by an object in motion. The earth revolving around the sun, you walking down the street, and molecules moving in space all have kinetic energy.
Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: K.E. = 1/2 m v2. If the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared. Kinetic energy is usually measured in units of Joules (J); one Joule is equal to 1 kg m2 / s2.
Work is done if the object you push changes it direction towards which you are pushing it.
No work is done if the force you exert does not make the object move.
Work is done if the object you push changes it direction towards which you are pushing it.
No work is done if the force you exert does not make the object move.
Professional air quality monitoring systems provide immediate, on-site data for analysis, compliance, and decision-making.
Monitor common gases, weather parameters, particulates.
Earliest Galaxies in the JADES Origins Field: Luminosity Function and Cosmic ...Sérgio Sacani
We characterize the earliest galaxy population in the JADES Origins Field (JOF), the deepest
imaging field observed with JWST. We make use of the ancillary Hubble optical images (5 filters
spanning 0.4−0.9µm) and novel JWST images with 14 filters spanning 0.8−5µm, including 7 mediumband filters, and reaching total exposure times of up to 46 hours per filter. We combine all our data
at > 2.3µm to construct an ultradeep image, reaching as deep as ≈ 31.4 AB mag in the stack and
30.3-31.0 AB mag (5σ, r = 0.1” circular aperture) in individual filters. We measure photometric
redshifts and use robust selection criteria to identify a sample of eight galaxy candidates at redshifts
z = 11.5 − 15. These objects show compact half-light radii of R1/2 ∼ 50 − 200pc, stellar masses of
M⋆ ∼ 107−108M⊙, and star-formation rates of SFR ∼ 0.1−1 M⊙ yr−1
. Our search finds no candidates
at 15 < z < 20, placing upper limits at these redshifts. We develop a forward modeling approach to
infer the properties of the evolving luminosity function without binning in redshift or luminosity that
marginalizes over the photometric redshift uncertainty of our candidate galaxies and incorporates the
impact of non-detections. We find a z = 12 luminosity function in good agreement with prior results,
and that the luminosity function normalization and UV luminosity density decline by a factor of ∼ 2.5
from z = 12 to z = 14. We discuss the possible implications of our results in the context of theoretical
models for evolution of the dark matter halo mass function.
Observation of Io’s Resurfacing via Plume Deposition Using Ground-based Adapt...Sérgio Sacani
Since volcanic activity was first discovered on Io from Voyager images in 1979, changes
on Io’s surface have been monitored from both spacecraft and ground-based telescopes.
Here, we present the highest spatial resolution images of Io ever obtained from a groundbased telescope. These images, acquired by the SHARK-VIS instrument on the Large
Binocular Telescope, show evidence of a major resurfacing event on Io’s trailing hemisphere. When compared to the most recent spacecraft images, the SHARK-VIS images
show that a plume deposit from a powerful eruption at Pillan Patera has covered part
of the long-lived Pele plume deposit. Although this type of resurfacing event may be common on Io, few have been detected due to the rarity of spacecraft visits and the previously low spatial resolution available from Earth-based telescopes. The SHARK-VIS instrument ushers in a new era of high resolution imaging of Io’s surface using adaptive
optics at visible wavelengths.
Nutraceutical market, scope and growth: Herbal drug technologyLokesh Patil
As consumer awareness of health and wellness rises, the nutraceutical market—which includes goods like functional meals, drinks, and dietary supplements that provide health advantages beyond basic nutrition—is growing significantly. As healthcare expenses rise, the population ages, and people want natural and preventative health solutions more and more, this industry is increasing quickly. Further driving market expansion are product formulation innovations and the use of cutting-edge technology for customized nutrition. With its worldwide reach, the nutraceutical industry is expected to keep growing and provide significant chances for research and investment in a number of categories, including vitamins, minerals, probiotics, and herbal supplements.
Seminar of U.V. Spectroscopy by SAMIR PANDASAMIR PANDA
Spectroscopy is a branch of science dealing the study of interaction of electromagnetic radiation with matter.
Ultraviolet-visible spectroscopy refers to absorption spectroscopy or reflect spectroscopy in the UV-VIS spectral region.
Ultraviolet-visible spectroscopy is an analytical method that can measure the amount of light received by the analyte.
This presentation explores a brief idea about the structural and functional attributes of nucleotides, the structure and function of genetic materials along with the impact of UV rays and pH upon them.
THE IMPORTANCE OF MARTIAN ATMOSPHERE SAMPLE RETURN.Sérgio Sacani
The return of a sample of near-surface atmosphere from Mars would facilitate answers to several first-order science questions surrounding the formation and evolution of the planet. One of the important aspects of terrestrial planet formation in general is the role that primary atmospheres played in influencing the chemistry and structure of the planets and their antecedents. Studies of the martian atmosphere can be used to investigate the role of a primary atmosphere in its history. Atmosphere samples would also inform our understanding of the near-surface chemistry of the planet, and ultimately the prospects for life. High-precision isotopic analyses of constituent gases are needed to address these questions, requiring that the analyses are made on returned samples rather than in situ.
THE IMPORTANCE OF MARTIAN ATMOSPHERE SAMPLE RETURN.
8th grade PE and KE introDUCTION FOR STUDENTS
1.
2. Table of Contents
• How is work, power and energy related?
• What is energy?
– 2 types
• Kinetic
• Potential
– 2 types
» Gravitational
» Elastic
3. Table of Contents
• What are other forms of energy?
1. Mechanical
2. Thermal
3. Electrical
4. Chemical
5. Nuclear
6. Electromagnetic
4. Work, Power and Energy
• What is WORK?
– Work is done on an object when the object moves in
the same direction that the force was applied.
• Lifting your book bag
• Work= Force (N) x Distance (m)
– 1Nm = 1J
• What is POWER?
– The rate at which work is done.
• Running vs walking with your book bag
• Power= work (J) / time (s)
– 1J/s = 1W
5. Work, Power, Energy
• Energy: The ability to do work or cause a
change.
– Whenever work is done energy is transferred to
that object.
– Power is the rate at which the energy is
transferred.
• What do YOU think the unit for energy is?
JOULES YAY!
6. Two Types of Energy
1. Kinetic Energy
2. Potential Energy
10. Kinetic Energy
• Velocity is squared
– Would velocity have the same, less or more of a effect than
mass on the kinetic energy of an object?
MORE
11. Kinetic Energy Example
• 1. Determine the kinetic energy of a 625-kg roller coaster car
that is moving with a speed of 18.3 m/s.
• 2. If the roller coaster car in the above problem were moving
with twice the speed, then what would be its new kinetic
energy?
12. • An object can have energy even when its not
moving!
– Stored energy based off of the objects shape or
position
13. Potential Energy
• Energy is stored or held in readiness
– Book on your desk
– Apple hanging from a tree
– Pulling back a rubber band
• If the apple stays in the tree, it will keep the
stored energy due to its height above the ground.
• If the apple falls, that stored energy of position is
converted to energy of motion.
14. Types of Potential Energy
1. Gravitational Potential Energy (GPE)
2. Elastic Potential Energy
15. Gravitational Potential Energy (GPE)
• GPE: The potential energy related to an
objects position above earths surface.
– Lifting your book on top of your desk = the work
you did to lift it
• Distance the book was moved: height
• Force you used to lift it: weight
17. Gravitational Potential Energy (GPE)
• To calculate GPE use this equation.
• On Earth the acceleration of gravity is
9.8 m/s2 and has the symbol g (in this equation)
18. Changing Gravitational Potential
Energy (GPE)
• The Gravitational potential energy of an object
can be increased by increasing the height.
• If the objects are at the same height then
what?
– The object with the larger mass would have more
gravitational pull.
19. Elastic Potential Energy
• Elastic Potential Energy: potential energy
associated with objects that can be stretched
or compressed.
– Pulling back a rubber band
– Winding up a toy
20. Elastic Potential Energy
• The rubber band has elastic potential energy
here because it has been stretched and is
storing its energy.
• If you let the rubber band go, it sails across
the room.
– As it flies through the air it has kinetic energy due
to its motion.
25. • If the kinetic energy of a falling apple is 5.2J
and its mechanical energy is 8.7J what is its
potential energy?
26. Potential = Kinetic
Kinetic = Potential
Mechanical Energy
• To sum up…
– An object with mechanical energy can do work on
another object!
– The more mechanical energy an object has the
more work it can do!
Law of Conservation of Energy
Energy can neither be created nor destroyed;
rather, it transforms from one form to another.
27. Thermal Energy
• All objects are made up of particles called
_____ and _________.
• These particles are always in motion.
– What kind of energy would they have?
Kinetic
• These particles are arranged in specific ways in
different objects
– What kind of energy would they have?
Potential
atoms molecules
28. Thermal Energy
• Total potential and kinetic energy of the
PARTICLES in a object is called Thermal
Energy!
29. Electrical Energy
• What do you think this is?
– Again this is energy of particles!
– The energy of tiny charged particles called…..
– Lets think of some examples....
ELECTRONS!!!!
30. Chemical Energy
• Chemical compounds are made up of _____
and _________.
• Bonds hold these atoms and molecules
together.
• These bonds have Chemical Energy!!!!
• Chemical energy can be released when these
bonds break!!!
atoms
molecules
31. Chemical Energy
• Chemical Potential Energy: energy that is
stored in chemical bonds
• Energy is stored in the bonds that hold carbon
and hydrogen atoms together
– The atoms are released when gas is burned
32. Nuclear Energy
• Potential or Kinetic?
• Where is the energy stored?
– NUCLEUS!
• When is the energy released?
– NUCLEAR REACTIONS!
• 2 kinds
1. Nuclear Fission
• Example?
2. Nuclear Fusion
• Example?
33.
34.
35. Electromagnetic Energy
• Travels in waves
– Does anyone know what waves are?
– These waves have…
• Electrical properties
• Magnetic properties
• What are some examples that we know of
that use waves to transfer energy?
Electromagnetic!
