A series circuit has a 100-? resistor, 4.00-mH inductor and a 0.100-?F capacitor connected across a 120-V rms ac source at the resonance frequency. What is the power dissipated by the circuit?
A) 120 W B) 45.8 W C) 160 W D) 100 W E) 144 W
E
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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.
Which of the following statements best describes the idea behind the Carbon Assimilation Experiment on board the Viking landers?
A) living organisms in the soil should incorporate carbon from atmospheric gases B) radioactive gases should be produced when radioactive nutrients are added to a soil sample C) soil with living organisms in it should contain organic molecules D) living organisms in the soil should give off gases when they metabolize nutrients
Astronauts, in satellites orbiting Earth, feel weightless. Are they really weightless?
A) Yes, because the centrifugal force due to their circular motion balances the force of gravity. B) Yes, because they are not in Earth's gravitational field. C) Yes, because they are "falling" around Earth. D) No, because the gravitational force is pulling downward on them. E) No, because the centrifugal force is pulling outward on them.
What is the probability of rolling either a 7 or 11 on a single roll of a pair of dice?
a. 1/6 b. 2/9 c. 3/8 d. 1/3 e. 1/2