A ball rolls off a shelf and hits the floor below 0.25 second later. To find the speed of the ball as it left the shelf, we would need
A. to repeat the experiment.
B. the distance measured along the floor to the point of impact.
C. the weight of the ball.
D. the height of the table.
Answer: B
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a. x-rays emitted due to electron-ion collisions. b. radiation losses due to T4 losses. c. conduction losses associated with ?T. d. convection losses associated with ?T. e. neutron collisions with atoms of moderator.
An ideal Carnot air conditioner operates between an indoor temperature of 20°C and an outdoor temperature of 39°C. How much energy does it use to remove 2000 J of heat from the interior of the house?
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Explain how the essential features of special relativity imply that a beam of light from a fast moving spaceship will always be observed to moving at the speed of light
What will be an ideal response?