A diver can change her rate of rotation in the air by "tucking" her head in and bending her knees. Let's assume that when she is stretched out straight she is rotating at 1 revolution per second
Now she goes into the "tuck and bend," effectively shortening the length of her body by half. What will her rate of rotation be now?
4 Hz
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Velocity Addition: In an "atom smasher," two particles collide head on at relativistic speeds. If the velocity of the first particle is 0.741c to the left, and the velocity of the second particle is 0.543c to the right (both as measured in the lab rest frame), how fast are the particles moving with respect to each other?
A. 0.916c B. 1.284c C. 0.934c D. 0.834c
A 44-g block of ice at -15°C is dropped into a calorimeter (of negligible heat capacity) containing 100 g of water at 5°C
When equilibrium is reached, how much of the ice will have melted? The specific heat of ice is 2090 J/(kg K) and the latent heat of fusion of water is 33.5 × 104 J/kg. A) 2.1 g B) 21 g C) 5.2 g D) 52 g E) 4.4 g
A sound with ten times the amplitude of another sound is judged to be
a. twice as loud. b. ten times as loud. c. 10 dB higher in sound level. d. 20 dB higher in sound level.
Two capacitors of 6.00 ?F and 8.00 ?F are connected in parallel. The combination is then connected in series with a 12.0-V battery and a 14.0-?F capacitor
(a) What is the equivalent capacitance? (b) What is the charge on the 6.00-?F capacitor? (c) What is the voltage across the 6.00-?F capacitor?