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) 3.65 × 10-12 m C) 4.85 × 10-12 m D) 2.42 × 10-12 m
D
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Stars are continually forming in the halo of our Galaxy today
Indicate whether the statement is true or false
A cannon recoils while firing a cannonball. The speed of the cannon's recoil is relatively small because the
A) force against the cannon is smaller than against the ball. B) momentum is mainly concentrated in the cannonball. C) cannon has much more mass than the cannonball. D) momentum of the cannon is smaller.
Compare two 1.0 L gas samples - one of hydrogen (molecular mass 2.0 u) and one of oxygen (molecular mass 16.0 u). Each sample contains the same number of molecules, and is at the same pressure. What is the ratio of temperatures of the oxygen sample to the hydrogen sample?
A. 1/8
B. 
C. 8
D. 
E. 1
The process whereby heat flows in the absence of any medium is referred to as
A) conduction. B) convection. C) radiation. D) inversion. E) evaporation.