The energy used by a 100 watt light bulb in 1 hour is
a. 0.01 J
b. 360,000 J
c. 100 J
d. 6,000 J
e. none of the above
B
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Two flat rings each having outer diameter of 6 inches and inner diameter of 3 inches are parallel and 4 inches apart as shown. Determine the shape factors, F1-2 and F2-1, which are equal.
When you see the bright flash of a meteor, what are you actually seeing?
A) emission of visible light from a particle that has not yet entered Earth's atmosphere B) the glow from a pea-size particle and the surrounding air as the particle burns up in our atmosphere C) a star that has suddenly shot across the sky D) the flash that occurs when a speeding rock from space hits the ground
To drop a package to Earth from a satellite, project it
A) straight downward. B) ahead at satellite speed. C) behind at satellite speed. D) none of the above
In a gaseous mixture of hydrogen and oxygen, the faster molecules on average are
A) hydrogen. B) oxygen. C) both the same D) not enough information