Chapter 4 ASTR
3) If you are driving at 30 miles per hour and increase your speed to 60 miles per hour, you quadruple your kinetic energy.
Answer: TRUE
7) The center of mass for Earth orbiting the Sun lies inside the Sun.
Answer: TRUE
1) Speed and velocity are the same thing.
Answer: FALSE
10) The escape velocity from Earth is greater for larger rockets than for small ones.
Answer: FALSE
14) Process of Science: Gravity only affects very massive objects and we can therefore only test theories about it when looking at the orbits of planets.
Answer: FALSE
4) If you double the mass of fusion material in a hydrogen bomb, you quadruple the amount of energy generated.
Answer: FALSE
5) When energy is converted from one form to another, a tiny amount is inevitably lost.
Answer: FALSE
6) Kepler deduced his laws of planetary motion once Newton had published his universal law of gravitation.
Answer: FALSE
8) There is no gravity in space.
Answer: FALSE
9) Doubling the distance between two objects halves the gravitational force between them.
Answer: FALSE
11) Tidal friction caused by Earth's stretching from the Moon's gravity is gradually slowing down the rotation of Earth.
Answer: TRUE
12) The Moon is slowly moving away from Earth.
Answer: TRUE
13) Unbound orbits have more orbital energy than bound orbits.
Answer: TRUE
2) The Moon is constantly falling toward Earth.
Answer: TRUE