Determine the heat capacity (in calories/°C) of a lake containing one million gallons (approximately 4 million kilograms) of water at 15°C.
A. 4 × 106
B. 4 × 109
C. 4 × 103
D. 1 × 103
E. 4 × 102
Answer: B
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If you were to unscrew bulb B from its socket (effectively removing it from the circuit and leaving a gap in its place), bulb A would
A. get brighter.
B. become dimmer.
C. remain at the same brightness.
D. go out.
In a parallel RLC circuit, where IR = IR, max sin(?t), the current through the inductor, IL, is
A. IL = ?IL, max sin(?t). B. IL = IL, max sin(?t). C. IL = ?IL, max cos(?t). D. IL = IL, max cos(?t). E. IL = IL, max tan(?t).
A skydiver of 75-kg mass has a terminal velocity of 60 m/s. At what speed is the resistive force on the skydiver half that when at terminal speed?
A. 15 m/s B. 49 m/s C. 30 m/s D. 42 m/s E. 36 m/s
Using the assumption that it takes several billion years for complex life to evolve in a stable environment, it is most likely that the stars with inhabited planets are:
A) G and K main sequence stars. B) white dwarf stars. C) A and B main sequence stars. D) neutron stars.