As a body falls through air starting from rest, its acceleration
a. is zero.
b. stays constant.
c. continuously decreases.
d. continuously increases.
e. gets smaller and smaller, eventually approaching zero.
e
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Which statement about asteroids is not true?
A) If we could put all the asteroids together, they would make an object about the size of Earth. B) Many but not all orbit the Sun in the asteroid belt. C) Some are more like loosely bound piles of rubble than solid chunks of rock. D) Most asteroids are not spherical in shape.
Consider the cosine of any angle between 35° and 40°. If the angle were doubled, what would happen to the cosine of the angle
a. It would halve. b. It would decrease to less than half its original value. c. It would decrease but be more than half its original value. d. In different cases, it could do any of the above.
The cosmic horizon is the distance beyond which there are no more stars or galaxies.
Answer the following statement true (T) or false (F)
Giant irregulars are the most massive of all known galaxies
Indicate whether the statement is true or false