An object is dropped from a height. Once it is moving, which of the following statements is true, at least at one point?
a. Its velocity is more than its acceleration.
b. Its velocity is less than its acceleration.
c. Its velocity is the same as its acceleration.
d. Its velocity is never equal to its acceleration.
D
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The three main components of the Milky Way galaxy are the ________, ________, and ________
Fill in the blank(s) with correct word
Which of the following statements about constellations is false?
A) There are only 88 official constellations. B) Some constellations can be seen from both the Northern and Southern hemispheres. C) Some constellations can be seen in both the winter and summer. D) It is possible to see all the constellations from Earth's equator. E) Most constellations will be unrecognizable hundreds of years from now.
A 0.28-kg stone you throw rises 34.3 m in the air. The magnitude of the impulse the stone received from your hand while being thrown is
a. 0.27 N s. b. 2.7 N s. c. 7.3 N s. d. 9.6 N s. e. 34.3 N s.
A star that is known to be 10,000 times brighter than the sun has the same apparent brightness as a nearby G2 star. How many times further away is the bright star?
A) The bright star is 100 times further away than the nearby G2 star. B) The bright star is 10 times further away than the nearby G2 star. C) The bright star is 10,000 times further away than the nearby G2 star. D) The bright star is actually a factor of 10 times closer than the nearby G2 star.