When ice melts, its temperature increases
a. True
b. False
Indicate whether the statement is true or false
False
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A figure skater on ice with arms extended, spins at a rate of 3.5 rev/s. After he draws his arms in, he spins at 6.0 rev/s. By what factor does the skater's kinetic energy change when he draws his arms in?
a. 2.4 b. 1.7 c. 0.58 d. 0.12
Projectile Motion: A child is trying to throw a ball over a fence. She gives the ball an initial speed of 8.0 m/s at an angle of 40° above the horizontal. The ball leaves her hand 1.0 m above the ground and the fence is 2.0 m high. The ball just clears the fence while still traveling upwards and experiences no significant air resistance. How far is the child from the fence?
A. 0.73 m B. 1.6 m C. 2.7 m D. 3.8 m E. 7.5 m
Determine the resonant frequency of the circuit.
A. 159 Hz B. 32 Hz C. 5 Hz D. 500 Hz E. 79.5 Hz
Which part of the figure below, (a) or (b), better shows specular reflection of light from the roadway?