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HW 2 due F Feb 20.
HW 2 due F Feb 20.

Forms of Energy Conversions
Forms of Energy Conversions

... Forms of Energy Conversions: use the back of this page for drawing if you need more room. There are six forms of energy: thermal (heat), electrical (moving electrons), electromagnetic (light), nuclear (energy that binds the nuclei of atoms), chemical and mechanical (a kind of kinetic energy of movin ...
verifying information
verifying information

Electromagnetic Waves
Electromagnetic Waves

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Microbial Metabolism

... Modes of E Conservation-ATP • Fermentation: in which redox reaction ocurs WITHOUT a terminal electron acceptor (couple oxiation with subsequent reduction of an organic ...
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Flux, Intensity, Brilliance and all those extremely

End-semester Examination 2013 Mechanics (PHY102A/N
End-semester Examination 2013 Mechanics (PHY102A/N

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2010 Q10 - Loreto Balbriggan
2010 Q10 - Loreto Balbriggan

... The history of anti-matter begins in 1928 when a young English physicist named Paul Dirac predicted an anti-particle for the electron. (i) What is anti-matter? An anti-matter particle was first discovered during the study of cosmic rays in 1932. Name the anti-particle and give its symbol. What happe ...
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Chemical Basis of Life

Physical Science
Physical Science

...  Examples include: x-rays, gamma rays, UV rays, visible light ► Different ...
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chapter 5

... corpuscular character is exhibited by the high frequencies radiations - ultraviolet, X-ray and, in particular, the gamma-rays. Their photons have enough energy to break chemical bonds in molecules, to produce photoelectric effect, to excite and ionize the atoms and molecules. Hence, these types of r ...
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Roller Coaster Physics

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Photosynthesis ppt Honors

... _____ Using a candle and a jar, he observed that plants produce a substance that kept the candle burning _____ He measured the mass of the soil in which a plant grew _____ He observed plants exposed to light ...
Visible Light - Eyemouth High School
Visible Light - Eyemouth High School

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Chapter 5

... • E = hʋ where h = Planck’s constant = 6.626 x 10-34 Js ...
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UNIT 9 REflection refraction diffraction

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section on Compton effect

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Matter - Fort Thomas Independent Schools

Unit 3d - OCCC.edu
Unit 3d - OCCC.edu

... • energy is emitted from an unstable nucleus, indicated by m following the mass number. • the mass number and the atomic number of the new nucleus are the same. • 99m here means metastable (=unstable) isotope ...
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Cosmic Rays - High Energy Physics at Wayne State

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Vocabulary list

Page 1 of 4 W mg = F kx = 2 v u at x x u v t x x ut at v u ax = + = + +
Page 1 of 4 W mg = F kx = 2 v u at x x u v t x x ut at v u ax = + = + +

Physical and Chemical Tests
Physical and Chemical Tests

... The actual energy difference is small. At 300 MHz, the energy difference for a proton is about 3 x 10-5 kcal mol-1. Because the energy difference is so small and the equilibrium between the two states is so fast, the numbers of nuclei in the two states are nearly equal, however, a slight excess will ...
1 - BrainMass
1 - BrainMass

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Photoelectric effect

The photoelectric effect is the observation that many metals emit electrons when light shines upon them. Electrons emitted in this manner can be called photoelectrons. The phenomenon is commonly studied in electronic physics, as well as in fields of chemistry, such as quantum chemistry or electrochemistry.According to classical electromagnetic theory, this effect can be attributed to the transfer of energy from the light to an electron in the metal. From this perspective, an alteration in either the amplitude or wavelength of light would induce changes in the rate of emission of electrons from the metal. Furthermore, according to this theory, a sufficiently dim light would be expected to show a lag time between the initial shining of its light and the subsequent emission of an electron. However, the experimental results did not correlate with either of the two predictions made by this theory.Instead, as it turns out, electrons are only dislodged by the photoelectric effect if light reaches or exceeds a threshold frequency, below which no electrons can be emitted from the metal regardless of the amplitude and temporal length of exposure of light. To make sense of the fact that light can eject electrons even if its intensity is low, Albert Einstein proposed that a beam of light is not a wave propagating through space, but rather a collection of discrete wave packets (photons), each with energy hf. This shed light on Max Planck's previous discovery of the Planck relation (E = hf) linking energy (E) and frequency (f) as arising from quantization of energy. The factor h is known as the Planck constant.In 1887, Heinrich Hertz discovered that electrodes illuminated with ultraviolet light create electric sparks more easily. In 1905 Albert Einstein published a paper that explained experimental data from the photoelectric effect as being the result of light energy being carried in discrete quantized packets. This discovery led to the quantum revolution. In 1914, Robert Millikan's experiment confirmed Einstein's law on photoelectric effect. Einstein was awarded the Nobel Prize in 1921 for ""his discovery of the law of the photoelectric effect"", and Millikan was awarded the Nobel Prize in 1923 for ""his work on the elementary charge of electricity and on the photoelectric effect"".The photoelectric effect requires photons with energies from a few electronvolts to over 1 MeV in elements with a high atomic number. Study of the photoelectric effect led to important steps in understanding the quantum nature of light and electrons and influenced the formation of the concept of wave–particle duality. Other phenomena where light affects the movement of electric charges include the photoconductive effect (also known as photoconductivity or photoresistivity), the photovoltaic effect, and the photoelectrochemical effect.
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