Astro set 4

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  1. The planets never travel in a straight line as they orbit the Sun. According to Newton's second law of motion, this must mean that _______
    a force is acting on the planets
  2. Which of the following scenarios involves energy that we would typically calculate with Einstein's formula E = mc2?
    A small amount of the hydrogen in a nuclear bomb becomes energy as fusion converts the hydrogen to helium.
  3. Newton showed that Kepler's laws are ________.
    natural consequences of the law of universal gravitation
  4. When space probe Voyager 2 passed by Saturn, its speed increased (but not due to firing its engines). What must have happened?
    Saturn must have lost a very tiny bit of its orbital energy.
  5. The energy attributed to an object by virtue of its motion is known as ________.
    kinetic energy
  6. What is the difference between a bound orbit and an unbound orbit around the Sun?
    An object on a bound orbit follows the same path around the Sun over and over, while an object on an unbound orbit approaches the Sun just once and then never returns.

Card Set Information

Astro set 4
2015-03-26 01:51:47
Astro set
exam 2
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