The phase angle in a series RL circuit at 1000 Hz with a 200-? resistor and a certain inductor is 40.0°. What is the value of the inductance in this circuit?
A) 83.9 mH
B) 73.9 mH
C) 26.7 mH
D) 36.7 mH
E) 57.9 mH
C
Physics & Space Science
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A hollow conducting sphere of radius 12 cm had a charge of 18
C placed on it. What is the potential at the surface of the sphere?
A. 0 V
B. 24 V
C. 
D. 
E. 
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Compared to a cold molecular cloud at 10 K, an HII region has a temperature about
A. 1,000 times hotter. B. 10 times hotter. C. 1,000,000 times hotter. D. the same.
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Besides direct formation of a black hole in a hypernova, some think that mergers between neutron stars can create even longer-lived gamma ray bursts as well
Indicate whether the statement is true or false
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The troposphere acquires most of its energy
content by a) latent heat transfer. b) Rayleigh scattering. c) absorption of terrestrial radiation. d) positive albedo changes.
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