The phase angle of an LRC series circuit with an inductive reactance of 200 ?, a resistor of 200 ? and a certain capacitor at 1000 Hz is 40.0°. What is the value of the capacitance in this circuit?
A) 1.95 µF
B) 2.95 µF
C) 3.95 µF
D) 4.95 µF
E) 5.95 µF
Answer: D
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An ideal gas with ? = 1.67 is initially at 0°C in a volume of 10.0 L at a pressure of 1.00 atm. It is then expanded adiabatically to a volume of 10.4 L. What is the final temperature of the gas?
A) -7.1°C B) 2.5°C C) -23°C D) 68°C E) -20°C
The normal force that acts on a block of ice that slides on a ramp
A) is equal to mg at all angles. B) decreases as the slope of the ramp increases. C) becomes greatest when the ramp is vertical.
If matter and antimatter combine, the result is energy
a. True b. False Indicate whether the statement is true or false
Comparing Mercury to the Earth's Moon:
A. Mercury is more than 100 times the mass of Earth's Moon. B. Mercury is only about 1/100th the mass of Earth's Moon C. they both take the same time to complete one orbit around the Sun. D. they both have little atmosphere and a similarly cratered surface. E. Since Mercury has so many active volcanoes, the craters on its surface have almost all been wiped away, while the Moon's craters remain.