The resistive force of friction occurs for

A) solids.
B) liquids.
C) gases.
D) all of the above


Answer: D

Physics & Space Science

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Electrons fired in vintage TV tubes traveled at about 0.25 times the speed of light, having more momentum and energy than would be required classically to get that speed. Strictly speaking, this

A) increased your electric bill. B) decreased your electric bill. C) had no effect on your electric bill.

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Which model of the universe gives the youngest age for its present size?

A) a recollapsing universe B) a coasting universe C) a critical universe D) an accelerating universe E) all models give the same age

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In straight-line motion, if a moving object speeds up, the direction of the acceleration is ______________ the direction of the velocity

Fill in the blank(s) with correct word

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Which of the following is a unit of energy:

a. watt b. ft—lb/sec c. newton/sec. d. horsepower e. joule

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