If you were on the Moon during a total lunar eclipse, the Sun would be hidden behind Earth
a. True
b. False
Indicate whether the statement is true or false
True
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If the Moon was twice as far away from the Earth as it is currently what would happen to total solar eclipses?
We would have more total solar eclipses. Nothing would change. We would have no total solar eclipses. We would have a total solar eclipse every two years.
A light bulb operating at a voltage of 120 V has a resistance of 200 ?. What is the power?
A) 100 W B) 60 W C) 72 W D) 14 x 10-3 W E) 7.2 W
Two masses, MA and MB, with MB = 2MA, are released at the same time and allowed to fall straight down. Neglect air resistance. When we compare their kinetic energies after they have fallen for equal times, we find that
a. KB = KA. b. KB = 2KA. c. KB = 4KA. d. KA = 2KB. e. KA = 4KB.
The laws of conservation of energy and momentum:
a. apply in all circumstances. b. are disproved by quantum mechanics. c. do not apply at the subatomic level. d. apply to some interactions but not at all to some others. e. are broken only for unmeasurable lengths of time.