If the scattering angle of the light in Compton's scattering experiment is 90°, what is the change in the wavelength of the light?
(melectron = 9.11 × 10-31 kg, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)
A) 1.22 × 10-12 m
B) 2.42 × 10-12 m
C) 3.65 × 10-12 m
D) 4.85 × 10-12 m
B
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Radiant energy from the Sun reaches the Earth at a rate of 
When 30.0% of the radiant energy is reflected and 70.0% absorbed, the average temperature of the Earth's atmosphere is 253 K or -20.0
If the atmosphere reflected 40.0% and absorbed 60.0% of the solar radiant energy, then what is the average temperature of the Earth's atmosphere?
A. -25.2
B. -27.0
C. -27.5
D. -28.5
E. -29.6
What is the giant impact hypothesis for the origin of the Moon?
A) The Moon formed from material blasted out of the Earth's mantle and crust by the impact of a Mars-size object. B) The Moon formed when two gigantic asteroids collided with one another. C) The Moon originally was about the same size as Earth, but a giant impact blasted most of it away so that it ended up much smaller than Earth. D) The Moon formed just like the Earth, from accretion in the solar nebula.
Use the appropriate relativity formula given in the text to answer the following. Isabella is moving by you at a speed of 0.8c. Although 1 minute passes on your watch, how much time will you see pass on her watch?
A) 36 seconds B) 1 minute C) 48 seconds D) 100 seconds
Process of Science: A beam of sunlight passing through a prism breaks up into a rainbow of colors. Some people thought the colors came from the prism itself
Describe a testable hypothesis of this explanation and explain how Newton showed it could not be true.