Solenoid A has length L and N turns, solenoid B has length 2L and N turns, and solenoid C has length L/2 and 2N turns. If each solenoid carries the same current, rank the magnitudes of the magnetic fields in the centers of the solenoids from largest to smallest
1.C > A > B
2.A > B > C
3.B > C > A
1
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A. 62.8. B. 66.0. C. 68.5. D. 70.5. E. 72.0.
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A storeroom has a volume of 30 m3 and is filled with air of an average molecular mass of 29 u. What is the mass of the air in the room at a pressure of 1.0 atm and temperature of 22°C? R = 0.082 L • atm/mol • K
a. 36 kg c. 72 kg b. 1240 kg d. 700 kg