When you compress air with a tire pump, the air temperature in the tire
A) increases.
B) decreases.
C) remains unaffected.
D) none of the above
Answer: A
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Which of the following explains why, a million years from now, Alpha Centauri will no longer be the nearest star system to our own?
A) Earth rotates once each day. B) Earth orbits the Sun once each year. C) The direction of Earth's axis in space precesses with a period of about 26,000 years. D) Stars appear to move randomly relative to our Sun in the local solar neighborhood. E) The universe is expanding.
Which of the following sequences correctly describes the stages of life for a low-mass star?
A) protostar, red giant, main-sequence, white dwarf B) protostar, main-sequence, white dwarf, red giant C) white dwarf, main-sequence, red giant, protostar D) protostar, main-sequence, red giant, white dwarf E) red giant, protostar, main-sequence, white dwarf
At the end and along the sides of a glacier, the sediment deposits may form ridges known as ______________
Fill in the blank(s) with correct word
Plane Mirrors: A lighted candle is placed a short distance from a plane mirror, as shown in the figure. At which location will the image of the flame appear to be located?
A. at A B. at B C. at C D. at M (at the mirror)