A simple pendulum takes 2.00 s to make one compete swing. If we now triple the length, how long will it take for one complete swing?
A) 6.00 s
B) 3.46 s
C) 2.00 s
D) 1.15 s
E) 0.667 s
B
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A bar magnet and an electrically polarized object are placed next to each other on a table. What happens?
A. The object and magnet accelerate toward each other until they touch and then they repel B. The positive part of the object turns toward the north pole of the magnet C. The positive part of the object turns toward the south pole of the magnet D. Nothing happens
How many elements have been identified?
a. 92 b. 104 c. 114 d. over 200 e. none of the above
Food cooked in a microwave oven depends on electrical
A) conduction. B) charge polarization. C) resistance changes. D) field strength. E) all of the above
A capacitor is connected in series with a resistor and a switch. With the switch open, the capacitor is charged to 9.0 V. When the switch is closed, how long will it take for the voltage across the capacitor to drop to 6.0 V if the time constant of the circuit is 4.0 s?
A. 0.3 s B. 1.2 s C. 1.6 s D. 2.7 s E. 12 s