The only spacecraft to successfully land on Venus were:
A) ESA's Giotto.
B) Russian Veneras.
C) NASA's Vikings.
D) NASA's Magellan.
E) NASA's Venus Rovers.
B
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A car travels east and its velocity decreases. The acceleration of the car is in which of the following directions?
A) Eastward B) Westward C) Northward D) Southward E) Downward
What did astronomers expect might cause the expansion of the Universe to slow down?
A.) Friction. B.) Running out of energy. C.) Being very old. D.) The gravitational pull of all the matter in it. E.) None of the above.
A 0.140-kg baseball is dropped from rest from a height of 2.20 m above the ground and experiences negligible air resistance as it falls. It rebounds to a height of 1.60 m. What change in the ball's momentum occurs as it rebounds from the ground?
A) 0.117 kg ? m/s upwards B) 0.117 kg ? m/s downwards C) 1.70 kg ? m/s upwards D) 0.350 kg ? m/s upwards E) 0.350 kg ? m/s downwards
Evaporator tubes in a refrigerator are constructed of 1 inch OD aluminum tubing with 1/8 in thick walls. The air surrounding the tubing is at 25ºF and the refrigerant in the evaporator is at 15ºF. Estimate the heat transfer to the refrigerant over 1 foot of length.
What will be an ideal response?