The mean free path of a molecule is 
m in an ideal gas at standard temperature and pressure. What is the mean free path when the diameter of the molecule is doubled?
A. 
B. 
C. 
D. 
E. 
C.
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A Compton scattering experiment is performed in which the scattered photons have a maximum energy of 17.2 keV. What was the incident energy of the photons used in this experiment?
A. 16.6 keV B. 18.5 keV C. 16.1 keV D. 17.8 keV
An object is 20.0 cm from the surface of a spherical Christmas tree ornament that is 8.00 cm in diameter. What is the magnification of the image?
a. – 0.091 b. – 0.545 c. + 0.091 d. + 0.545 e. + 0.364
A conducting loop in the form of a circle is placed perpendicular to a magnetic field of 0.50 T. If the area of the loop decreases at a rate of 3.0 × 10-3 m2 /s, what is the induced emf in the loop?
A) 1.7 mV B) 4.3 mV C) 5.5 mV D) 0 mV E) 1.5 mV
An iceberg is floating in the ocean with 10% of its volume extending above the ocean's surface. What can you say about the iceberg?
A. As it melts, a smaller fraction of its volume will extend above the surface B. Its density is close to but smaller than the density of water C. It displaces only 90% of its weight in water D. Its weight is less than the water it displaces