The force of gravity acting on you will increase if you
A) burrow deep inside Earth.
B) stand on a planet with a shrinking radius.
C) both of these
D) neither of these
Answer: B
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Quasars must be small because they
a. have high radial velocities. b. are very luminous. c. are surrounded by quasar fuzz. d. radiate huge amounts of energy. e. fluctuate rapidly on time scales as short as a few hours.
The colors of the rainbow from shortest to longest wavelength are ______________________
Fill in the blank(s) with correct word
Why do white dwarfs have high temperatures?
A. chemical reactions on their surfaces B. heat left over from their formation C. nuclear fusion in their cores D. frictional heating from motions inside the white dwarfs
Like Saturn's more famous ring system, Jupiter's ring is also made of ice, just older and dirtier than the bright fresh material at Saturn
Indicate whether the statement is true or false