When current is flowing in an ordinary metal wire, the magnitude of the average velocity of the electrons is closest to
A) 10 m/s.
B) the speed of light.
C) 1 mm/s.
D) 1 km/s.
E) 1 m/s.
C
Physics & Space Science
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Support reaction Gy in the frame below is:
(A) 1.83P
(B) 2.05P
(C) 2.75P
(D) 21.77P
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Which planet has the most moons?
a) Earth b) Mercury c) Saturn d) Mars e) Venus
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Which of the following worlds could an astronaut visit without the need for a spacesuit (and survive)?
A) Mercury B) Venus C) The Moon D) Mars E) None of the above; an astronaut would need a spacesuit to survive a visit to any world in the solar system (aside from Earth).
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A skydiver jumps from a high-flying plane. As her velocity of fall increases, her acceleration
A) increases. B) decreases. C) remains unchanged regardless of air resistance.
Physics & Space Science