A 10-kg dog is runnng with a speed of 5.0 m/s. What is the minimum work required to stop the dog in 2.40 s?
A) 125 J B) 50 J C) 75 J D) 100 J
A
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How is the sun situated in the universe?
A) The sun is an isolated star that is far outside of all the galaxies in the universe, and is thus not part of any galaxy. B) The sun is just one of a large number of stars, and is located on the fringes of the Milky Way galaxy, which itself is just one galaxy among many galaxies. C) The sun is just one of many stars, and is located near the center of the rest of the stars in the universe. D) The sun is at the center of the universe. E) Earth is at the center of the universe, and the sun orbits around the earth.
As a supersonic aircraft gains speed, the angle of its shock wave
A) narrows. B) widens. C) remains unchanged.
Give and explain an example of the use of the Doppler Effect on the highway
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