What inductance must be put in series with a 200-? resistor at 4.00 kHz to have a total impedance of 240 ??
A) 12 mH B) 6.28 mH C) 3.28 mH D) 4.28 mH E) 5.28 mH
E
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What is the approximate latitude of the observer in the diagram below if they are located in the hemisphere containing the north celestial pole?
?
a.
90° N
b.
90° S
c.
50° N
d.
50° S
e.
0°
Which of the following general statements about light and Earth's atmosphere is not true?
A) Visible light from the Sun is absorbed in the exosphere. B) X-rays from the Sun are absorbed in the thermosphere. C) Ultraviolet from the Sun is absorbed primarily in the stratosphere. D) Infrared light emitted by Earth itself is absorbed primarily in the troposphere.
What happens to the visible radiation produced by new stars within a molecular cloud?
A) It escapes the cloud completely. B) It is absorbed by dust grains and heats up the cloud. C) It is reflected back onto the protostar, heating it up further. D) The blue light is absorbed and the red light transmitted. E) It shoots out in bright jets.
A 10.0-?F capacitor is plugged into a 110 V rms 60.0-Hz voltage source, with an ammeter in series. What is the rms value of the current through the capacitor?
A. 0.202 A (rms) B. 0.415 A (rms) C. 0.626 A (rms) D. 0.838 A (rms) E. 0.066 A (rms)