A 30-kg child sitting 5.0 m from the center of a merry-go-round has a constant speed of 5.0 m/s. While she remains seated in the same spot and travels in a circle, the work the seat performs on her in one complete rotation is
a. 0 J.
b. 150 J.
c. 1 500 J.
d. 4 700 J.
e. 46 000 J.
A
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Assuming that no energy is lost in the form of heat, after the ball compresses the spring shown here, what is the maximum potential energy it may once again attain?
a. 0 J. b. 5 J. c. 2.5 J. d. Significantly less than 5 J because of energy lost as heat because of friction. e. Significantly less than 2.5 J because of energy lost as heat because of friction.
A coil of wire is connected to a galvanometer. When a bar magnet is moved in and out of the coil, the galvanometer records a current because of electromagnetic induction
a. True b. False Indicate whether the statement is true or false
When red and blue light pass through a prism which one bends more?
A. Depends on the material the prism is made of. B. There is no way to predict this. C. Red light D. Blue light
Where did Earth come from?
A) From gases gathered by the sun after the sun had already formed. B) Earth was originally one of Jupiter's moons. C) From the same collapsing gas cloud that gathered together to form the sun. D) A passing star tore off part of the sun, and this part developed into Earth. E) The Big Bang compressed matter into stars and planets such as Earth.