A thrown stone hits a window but doesn't break it. Instead, it reverses direction and ends up on the ground below the window. In this case, we know:
a. the force of the stone on the glass > the force of the glass on the stone.
b. the force of the stone on the glass = the force of the glass on the stone.
c. the force of the stone on the glass < the force of the glass on the stone.
d. the stone didn't slow down as it hit the glass.
B
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As a normal object’s thermal energy U goes to zero, the slope of a graph of its entropy S versus U
A. approaches infinity. B. approaches some positive value less than infinity. C. approaches zero. D. approaches some finite negative value. E. approaches negative infinity. F. depends entirely on the object’s properties.
Two satellites with equal rest masses of 100 kg are traveling toward each other in deep space. They have identical speeds of 0.600c. The satellites collide and somehow manage to stick together
What is the rest mass of the combined object after the collision? A) 200 kg B) 225 kg C) 250 kg D) 275 kg E) 300 kg
Which of the following is an incorrect ordering of the planets' distances from the Sun, from nearest to furthest?
a. Mercury, Venus, Uranus, Neptune b. Earth, Mars, Jupiter, Saturn c. Venus, Mars, Jupiter, Neptune d. Earth, Venus, Jupiter, Uranus
A figure skater is spinning slowly with arms outstretched. She brings her arms in close to her body and her moment of inertia decreases by 1/2. By what factor does her rotational kinetic energy change?
A) 2 B) 4 C) D) 1/2 E) It doesn't change.