A 200-? resistor, 40.0-mH inductor and a 2.00-?F capacitor are connected in series with a 120-V rms source at 1000 Hz. What is the phase angle of this circuit?
A) 49.3°
B) 90.0°
C) 40.7°
D) 0°
E) 45.0°
C
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What is at the very center of the Milky Way and what is the best evidence for it?
A: Only young, hot, massive stars- they've been detected in the IR B: A cluster of neutron stars, 3 MS black holes- detected in the IR C: A supermassive black hole- detections of stellar orbits over 8 years D: Old stars, gas, dust, and giant molecular clouds- detected in the optical E: Bok Globules, planetary nebulae, and brown dwarfs- detected with X-rays
Your lungs hold 4.2 L of air at a temperature of 27°C and a pressure of 101.3 kPa. How many moles of air do your lungs hold? (R = 8.31 J/mol ? K)
A) 0.15 moles B) 0.17 moles C) 0.19 moles D) 0.21 moles E) 0.23 moles
After a major earthquake, the rocks may continue to adjust to their new positions, causing additional vibrations called ______________
Fill in the blank(s) with correct word
The distance traveled by a wave during a single period is
A) one-half wavelength. B) one wavelength. C) two wavelengths. D) none of the above