A spaceship takes a nonstop journey to a planet and returns in 10 hours according to a clock on the spaceship. If the speed of the spaceship is 0.80c, how much time has elapsed on the Earth?
A)
3.2 h
B)
7.0 h
C)
15 h
D)
17 h
E)
19 h
D
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What will be an ideal response?
A heavy weight is supported by two cables that exert tensions of magnitude
and 
. Which statement is correct?
?
?
a..
b.
c.
d.
e.
We need the mass of the box in order to determine the correct answer.
A 45-mH inductor is connected in series with a 60-? resistor through a 15-V dc power supply and a switch. If the switch is closed at t = 0 s, what is the current after 7.0 ms?
A) 250 mA B) 650 mA C) 550 mA D) 280 mA E) 850 mA
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