A gymnast performing somersaults in a high-flying plane moving at constant velocity needs to make
A) small adjustments to compensate for the airplane's velocity.
B) major adjustments to compensate for the airplane's velocity.
C) no adjustments.
D) none of the above
Answer: C
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A crack is 1 mm long and has a 1-nm radius of curvature at the crack tip. What is the magnitude of the stress concentration factor for this crack?
(a) 2 (b) 20 (c) 200 (d) 2000
A circular coil of copper wire is lying flat on a horizontal table. A bar magnet is held above the center of the coil with its south pole downward. The magnet and the coil are now both raised upward with the same velocities
As viewed from above, what is the direction of the current induced in the coil as the magnet approaches the coil? A) counterclockwise B) clockwise C) No current is induced in the coil. D) An emf but no current is induced in the coil.
A skydiver of 75 kg mass has a terminal velocity of 60 m/s. At what speed is the resistive force on the skydiver half that when at terminal speed?
a. 15 m/s b. 49 m/s c. 30 m/s d. 42 m/s e. 36 m/s
Internal energy is a _____________variable.
Fill in the blank(s) with the appropriate word(s).