The molecules in a room-temperature glass of water jostle around at
A) various speeds.
B) much the same speed.
C) constant speeds.
Answer: A
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Two ice skaters push off against one another starting from a stationary position. The 45.0-kg skater acquires a speed of 0.375 m/s. What speed does the 60.0-kg skater acquire?
Assume that any other unbalanced forces during the collision are negligible. A) 0.500 m/s B) 0.281 m/s C) 0.375 m/s D) 0.750 m/s E) 0.000 m/s
A hot piece of iron is thrown into the ocean and its temperature eventually stabilizes. Which of the following statements concerning this process is correct? (There may be more than one correct choice.)
A) The change in the entropy of the iron-ocean system is zero. B) The entropy gained by the iron is equal to the entropy lost by the ocean. C) The entropy lost by the iron is equal to the entropy gained by the ocean. D) The ocean gains more entropy than the iron loses. E) The ocean gains less entropy than the iron loses.
On the Moon, what is the approximate value for the acceleration due to gravity?
What is the wavelength of the line in the hydrogen spectrum that is comprised of transitions from the n = 5 to the n = 3 levels?
a. 1880 nm c. 2250 nm b. 1290 nm d. 1920 nm