Suppose your normal resting heart rate is 60 beats per minute. Now, suppose you board a spaceship that travels away from Earth at 90% of the speed of light. While on the ship, you measure your heart rate. What will it be?
A) It will be 46 beats per minute.
B) It will be 74 beats per minute.
C) It will still be 60 beats per minute.
D) It will be 12 beats per minute.
C
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A 2-kg rifle that is suspended by strings fires a 0.01-kg bullet at 200 m/s. The recoil velocity of the rifle is about
A) 0.001 m/s. B) 0.01 m/s. C) 0.1 m/s. D) 1 m/s. E) none of these
The rings of Neptune
A) were confirmed by the Voyager 2 in 1989. B) number five, with three narrow, two more diffuse. C) all lie within Neptune's Roche Limit. D) often appear as clumpy ring arcs, rather than complete and symmetrical. E) All of these are correct.
Planets have been detected around a pulsar
Indicate whether the statement is true or false
A metal cylinder of radius 2.0 mm is concentric with another metal cylinder of radius 5.0 mm. If the space between the cylinders is filled with air and the length of the cylinders is 50 cm, the capacitance of the arrangement is
A) 33 pF. B) 60 pF. C) 22 pF. D) 30 pF. E) 11 pF.