An inductor stores energy in its magnetic field
A) True B) False
A
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Ideal Gas Law: A 20.0-L pressure vessel holds 2.00 mol of oxygen at 30°C. What is the pressure inside the vessel? (R = 8.31 J/mol ? K)
A. 101 Pa B. 101 kPa C. 1.01 MPa D. 2.52 MPa E. 252 kPa
The superposition of two waves, 
and 
,results in a wave with a frequency of
A. 85 Hz. B. 170 Hz. C. 85? Hz. D. 340 Hz. E. 170? Hz.
Analysis of rocks returned from the lunar maria during the Apollo program suggest they formed
A) during the period of early bombardment constituting the first few hundred million years of the Earth's history B) fairly recently during the last million years or so C) roughly 65 million years ago D) between 3.9 and 3.0 billion years ago
What is the minimum frequency with which a 300-turn, flat coil of cross sectional area 370 cm2 can be rotated in a uniform 25-mT magnetic field if the maximum value of the induced emf is to equal 8.6 V?
a. 0.20 Hz b. 2.2 Hz c. 4.9 Hz d. 31 Hz e. 0.031 Hz