No force of gravity acts on an astronaut in an orbiting space station
1.True
2.False
2
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Energy in Capacitors: When a 4-?F capacitor has a potential drop of 20 V across its plates, how much electric potential energy is stored in this capacitor?
A. 0.8 ?J B. 8 ?J C. 80 ?J D. 800 ?J E. 8000 ?J
When your eye forms an image, the ________ plays a role analogous to the detector in a camera.
A) retina B) lens C) pupil D) optic nerve
What is the origin of the jovian moons?
A) They all formed with the planet. B) They were main belt asteroids, captured by Jupiter's strong gravity. C) They are Trojan asteroids, orbiting 60 degrees ahead or behind Jupiter. D) The four Galilean moons formed with Jupiter, most others were later captures. E) They were ripped from the planet's interior in an early cataclysmic event.