A solid object labeled A weighs more than another solid object labeled B. Which of the following are true?
a. A occupies more volume than B.
b. A has a greater weight density than B.
c. A has a greater specific gravity than B.
d. A has greater volume but lesser weight density than B.
e. none of the above
e
RATIONALE: A and B are not necessarily made of the same substance.
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Time Dilation: Astronaut Rachel leaves Earth in a spaceship at a speed of 0.960c relative to an observer on Earth. Rachel's destination is a star system 14.4 light-years away (one light-year is the distance light travels in one year). According to Rachel, how long does the trip take?
A. 14 years B. 15 years C. 11 years D. 4.2 years E. 23 years
Aluminum has a higher specific heat capacity than iron. This means that for equal masses of aluminum and iron, the metal that heats more quickly when the same amount of heat is applied is
A) aluminum. B) iron. C) need more information
To determine the height of a flagpole, Abby throws a ball straight up and times it
She sees that the ball goes by the top of the pole after 0.50 s and then reaches the top of the pole again after a total elapsed time of 4.1 s. How high is the pole above the point where the ball was launched? (You can ignore air resistance.) A) 10 m B) 13 m C) 16 m D) 18 m E) 26 m
Impulse: A very light ping-pong ball moving east at a speed of 4 m/s collides with a very heavy stationary bowling ball. The Ping-Pong ball bounces back to the west, and the bowling ball moves very slowly to the east. Which object experiences the greater magnitude impulse during the collision?
A. Neither; both experienced the same magnitude impulse. B. the Ping-Pong ball C. the bowling ball D. It is impossible to tell since the actual mass values are not given. E. It is impossible to tell since the velocities after the collision are unknown.