As a space shuttle is launched into orbit, the direction of its acceleration
a. always points upward.
b. always points downward.
c. varies between pointing upward and pointing downward.
d. stays constant.
c
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Which of the following has the most significant (densest) atmosphere?
A. Mercury B. Venus C. Mars D. Pluto E. Earth's Moon
An ideal spring has a spring constant of 2500 N/m. is stretched 4.0 cm. How much work is required to stretch the spring by 4.0 cm?
A) 4.0 J B) 0.00 J C) 1.0 J D) 3.0 J E) 2.0 J
You are in a train traveling on a horizontal track and notice that a piece of luggage starts to slide directly toward the front of the train. From this observation, you can conclude that this train is
A) speeding up. B) slowing down. C) changing direction. D) speeding up and changing direction. E) slowing down and changing direction.
A hospital patient has been given a sample of 131I , which has a half-life of 8.04 days. This sample is decaying at 5.9 times the acceptable level for exposure to the general public
How long must the patient wait for the decay rate of the sample to reach the acceptable level? A) 21 days B) 14 days C) 9.9 days D) 8.9 days