You can experience weight
A) standing on Earth's surface.
B) in an accelerating elevator away from Earth.
C) in a rotating habitat in space.
D) all of the above
Answer: D
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Why are there no impact craters on the surface of Io?
A) It is too small to have been bombarded by planetesimals in the early solar system. B) Any craters that existed have been eroded through the strong winds on Io's surface. C) Jupiter's strong gravity attracted the planetesimals more strongly than Io, and thus none landed on its surface. D) Io did have impact craters, but they have all been buried in lava flows. E) Io's thick atmosphere obscures the view of the craters.
What is the self-inductance of a solenoid 30.0 cm long having 100 turns of wire and a cross-sectional area of 1.00 × 10-4 m2? (?0 = 4? × 10-7 T • m/
A) A) 4.19 nH B) 4.19 pH C) 4.19 µH D) 4.19 mH E) 4.19 H
At a carnival game, two balls, identical in mass and radius, are made of steel and of rubber. They are offered as a means of knocking over a bowling pin by throwing them at the pin. If they are thrown with the same speed and hit the same spot on the bowling pin, which is more likely to knock the pin over?
A. The steel ball B. Without knowing more information this cannot be answered. C. The clay ball D. Both are equally likely since they have the same momentum
A uniform rod of length (L = 2.0 m) and mass (M = 1.5 kg) is pivoted about a horizontal frictionless pin through one end. The rod is released from rest at an angle of 30° below the horizontal. What is the angular speed of the rod when it passes through the vertical position? (The rotational inertia of the rod about the pin is 2.0 kg?m2.)
A. 3.5 rad/s B. 2.7 rad/s C. 3.1 rad/s D. 2.3 rad/s E. 1.6 rad/s