A ball is thrown straight up, reaches a maximum height, then falls to its initial height. Make a statement about the direction of the velocity and acceleration as the ball is coming down
A)
Both its velocity and its acceleration point upward.
B)
Its velocity points upward and its acceleration points downward.
C)
Its velocity points downward and its acceleration points upward.
D)
Both its velocity and its acceleration point downward.
E)
Neither velocity nor acceleration can be determined without additional information.
D
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a. True b. False Indicate whether the statement is true or false
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Indicate whether the statement is true or false
The transition from chemistry to biology occurred
A) gradually in a number of distinct steps B) very quickly in in one single step C) very quickly in a number of distinct steps D) gradually in one single step
For the mercury in a thermometer to expand from 4.00 cm3 to 4.10 cm3, what change in temperature is necessary? The mercury has a volume expansion coefficient of 1.80 × 10-4 K-1
A) 400 C° B) 140 C° C) 14 C° D) 8.2 C°