A parachutist steps from a hovering helicopter and falls for 5 s before reaching terminal velocity. During this 5-s interval, her acceleration
A) is constant.
B) increases.
C) decreases.
D) is zero.
E) none of the above
Answer: C
Physics & Space Science
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During a total lunar eclipse, which of the following are true? I. The photosphere of the Sun is obscured by the Moon. II. The Moon is in Earth's umbra. III. The Moon is new. IV. The Moon is full
a. I, III b. II, IV c. I, II, III d. II, III e. I, II, III, IV
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Two masses, M > m, travel down the surfaces shown. Both surfaces are frictionless. Which mass has the larger speed at the bottom?
What is meant by mixed flow? How is it different from unmixed flow?
What will be an ideal response?
Physics & Space Science
Which cones on the eye are most sensitive to light?
A) red B) infrared C) green D) UV E) blue
Physics & Space Science