A series combination of a 48.0-?F capacitor and a resistor are connected to a 12-V battery. After one second, the voltage across the capacitor is 10 V. What is the resistance of the resistor?
a. 11.6 k?
b. 3.47 k?
c. 37.3 k?
d. 208 k?
a
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If there were no greenhouse effect, Earth's average temperature would likely be
A) near absolute zero. B) a frigid -18°C. C) comfortably cooler. D) warmer than now.
If you push an object twice as far while applying the same force, you do
A) twice as much work. B) four times as much work. C) the same amount of work.
A 1000-kg object hangs from the lower end of a steel rod 5.0 m long that is suspended vertically. The diameter of the rod is 0.80 cm and Young's modulus for the rod is 210,000 MN/m2. What is the elongation of the rod due to this object?
A) 1.2 cm B) 0.46 cm C) 0.12 cm D) 1.8 cm E) 0.047 cm
A brass cube, 10 cm on a side, is raised in temperature by 150°C. The coefficient of volume expansion of brass is 57 × 10^-6/°C. By what percentage is any one of the 10-cm edges increased in length?
a. 4% c. 0.38% b. 2.8% d. 0.29%