A series circuit has a 100-? resistor, a 0.100-?F capacitor, and a 2.00-mH inductor connected across a 120-V rms ac source operating at resonant frequency. What is the rms value of the voltage across the capacitor?
A) 54.0 V
B) 120 V
C) 150 V
D) 533 V
E) 170 V
E
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The creation of ________ require(s) that a young hot star (T ? 25,000 K) be relatively nearby
a. emission nebulae b. HI regions c. molecular clouds d. the cool gas of the interstellar medium e. 21-cm radiation
An object is moving with constant non-zero acceleration on the +x axis. The velocity versus time graph of this object is
A) a horizontal straight line. B) a vertical straight line. C) a straight line making an angle with the time axis. D) a parabolic curve. E) a hyperbolic curve.
Venus and Earth started out with roughly the same amount of water. While Earth still has water in abundance, all of Venus' was lost. Where did it go?
A) It chemically combined with CO2 to form H2CO3.
B) Ultraviolet rays split the hydrogen from the oxygen components, and the hydrogen escaped into space.
C) It all evaporated into space due to the intense daytime heat of 470°C.
D) Scientists are still trying to determine this.
What three classes of stars are most likely to house life like ours? Why?
What will be an ideal response?