A majorette fastens two batons together at their centers to form an X shape. What is the moment of inertia of the combination about an axis through the center of the X
if each baton was 1.2 m long and each ball at the end of each baton has a mass of 0.25 kg (assume negligible mass in the rods)?
0.36 kg? m2
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An refrigerator keeps food in the freezer portion at 
and dumps excess heat into the kitchen, whose temperature is 
If the refrigerator has half the coefficient of performance of an ideal reversible refrigerator, and if its motor can supply 250W of power, what is the rate of heat flow into the kitchen?
A. 950W B. 910W C. 625W D. 150W
In the situation described in problem N12T.6, what do you think will happen to the satellite’s speed as time passes?
A. It slowly decreases. B. It remains roughly the same. C. It slowly increases.
The period before the separation of the gravitational force is the Planck Epoch
Indicate whether the statement is true or false
A boxcar is equipped with a red laser at the back of the car and a blue laser at the front of the car. When the boxcar is traveling with speed v, the two lasers send out pulses simultaneously. An observer on the ground sees
A. the two pulses hitting the opposite walls at the same time. B. the red pulse hitting the front before the blue pulse hits the back. C. the blue pulse hitting the back before the red pulse hits the front.