One "food calorie" equals
a. 1 calorie c. 1000 calories
b. 100 calories d. none of the above
C
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A 22
F capacitor is charged to 100 V. What is the energy stored by the capacitor?
A. 0.22 J B. 0.11 J C. 22 J D. 11 J E. 44 mJ
Resistance and Resistivity: A wire of resistivity ? must be replaced in a circuit by a wire of the same material but four times as long. If, however, the total resistance is to remain as before, the diameter of the new wire must
A. be the same as the original diameter. B. be one-half the original diameter. C. be one-fourth the original diameter. D. be two times the original diameter. E. be four times the original diameter.
Three horses are side-by-side on a merry-go-round: one at the edge, one near the axis, and one in between. Each horse has the same angular speed. Which horse has the greatest linear speed?
A. The horse nearest the axis B. The horse in the middle C. The horse at the edge D. The linear speed is the same for all three horses
What is the average power dissipation in a series RC circuit if R = 5.00 k?, C = 2.00 ?F, and V = 170 cos (300t)?
a. 0.930 W b. 2.60 W c. 28.2 W d. 157 W e. 5.20 W