A physics student is riding on a train traveling north. Having read about inertia, the student performs an experiment with a golf ball. He reaches over the aisle and drops the ball from rest. Instead of hitting the floor directly below the student's hand, it hits to the north, i.e., forward of that position. Which of the following might be the cause for this to happen?
a. The train is moving at constant velocity.
c. The train is slowing down.
b. The train is speeding up.
d. Whatever the cause, it cannot be any of the answers given.
C
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What makes Iapetus different than most other Jovian satellites? a. Its surface is so eroded that it has no distinguishing surface features. b. It is not impacted by Saturn's tidal heating
c. It is perfectly spherical and highly reflective. d. It has an old and heavily cratered surface. e. It is asymmetrical and always faces backward to Saturn.
How does Pluto's mass compare with that of Earth's Moon?
a) The Moon is roughly 7 times more massive than Pluto. b) Pluto is roughly 7 times more massive that the Moon. c) They both have the same mass. d) Pluto's mass is roughly 1/20th the mass of the Moon. e) The Moon's mass is roughly 1/20th the mass of Pluto.
Planets with orbital semimajor axes less than 0.1 AU are called ________
Fill in the blank(s) with correct word
A building made with a steel structure is 650 m high on a winter day when the temperature is 0° F. How much taller (in cm) is the building when it is 100° F? (The linear expansion coefficient of steel is 11 × 10^?6 (°C)?1.)
a. 71 b. 36 c. 40 d. 46 e. 65