The air in your cousin's room has
A) mass.
B) weight.
C) energy.
D) all of the above
E) none of the above
Answer: D
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If we were to intercept a strong radio signal at 1420 MHz in binary format from another civilization, this would be an example of
A) a signal used for communication between a civilization's home world and another planet in its own planetary system B) a signal used for local communication in the world where the intelligent beings exist C) an intentional signal beacon D) a signal used for communication between a civilization's home world and another star system
A certain photon, after being scattered from a free electron that was at rest, moves at an angle of 120° with respect to the incident direction
If the wavelength of the incident photon is 0.6110 nm, what is the kinetic energy of the recoiling electron? (melectron = 9.11 × 10-31 kg, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s) A) 1.5 × 10-18 J B) 1.9 × 10-18 J C) 3.1 × 10-18 J D) 4.3 × 10-18 J E) 5.2 × 10-18 J
The pressure at what depth in seawater 
is equivalent to that at a depth of 10.0 m in fresh water 
A. 10.2 m B. 9.8 m C. 10.3 m D. 9.7 m
3.0 moles of gas expand from an initial volume of 0.040 m3 to a final volume of 0.085 m3 while the temperature of the gas is kept fixed at 300 K. How much work is done by the system?
A) 5.6 kJ B) 6.6 kJ C) 7.6 kJ D) 8.6 kJ E) 14 kJ