A 3.0-kg mass and a 5.0-kg mass hang vertically at the opposite ends of a very light rope that goes over an ideal pulley. If the masses are gently released, what is the resulting acceleration of the masses?
A) 0.00 m/s2
B) 3.7 m/s2
C) 2.5 m/s2
D) 4.9 m/s2
E) 6.1 m/s2
C
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If we divide the mass of a star by its volume we calculate the star's ____________________
Fill in the blank(s) with correct word
Which of the following is a general characteristic of the four jovian planets in our solar system?
A) They are significantly lower in average density than are the terrestrial planets. B) They have very high levels of volcanic and tectonic activity. C) They are made predominantly of elements heavier than hydrogen and helium. D) They rotate more slowly than the terrestrial planets.
A monatomic ideal gas is compressed isobarically to one-third of its initial volume. The resulting pressure will be
A) three times as large as the initial value. B) equal to the initial value. C) more than three times as large as the initial value. D) equal to the initial value. E) impossible to predict on the basis of this data.
What is the best description of the Earth's rotation over its entire history?
A) It has periodically reversed directions, as the magnetic polarity reversals show. B) It has been constant over the entire history of the solar system. C) It undergoes abrupt changes, as the magnetic variations show. D) It has slowed down very gradually at about .0015 seconds per century. E) It has sped up at about .013 seconds per century.