When sound travels faster higher above the ground than below, bending of sound tends to be
A) upward.
B) downward.
C) to the left.
D) to the right.
E) none of the above
Answer: B
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A diatomic has a moment of inertia of 7.73 × 10-45 kg? m2. What is its rotational energy in the quantum state characterized by l = 2? (h = 6.626 × 10-34 J ? s, h = 1.055 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A) 87.1 µeV B) 27.0 µeV C) 72.2 µeV D) 587 µeV E) 22.7 µeV
Force on a Moving Charge: An electron has an initial velocity to the south but is observed to curve upward as the result of a magnetic field. This magnetic field must have a component
A. to the west. B. to the east. C. upward. D. downward. E. to the north.
The energy of a system
a. always increases. b. always remains constant. c. decreases when work is done by the system. d. decreases when work is done on the system.
A solid cylindrical bar conducts heat at a rate of 25 W from a hot to a cold reservoir under steady state conditions
If both the length and the diameter of this bar are doubled, the rate at which it will conduct heat between these reservoirs will be A) 200 W B) 100 W C) 50 W D) 25 W E) 12.5 W