An ac source of maximum voltage V0 = 30 V is connected to a resistor R = 50 ?, an inductor L = 0.6 H, and a capacitor C = 20 ?F
What is the maximum charge on the capacitor when the frequency of the source is set to the resonance frequency of the circuit? A)
1.0 mC
B)
0
C)
2.1 mC
D)
4.2 mC
E)
8.4 mC
C
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In a steam engine, steam at 140°C in a turbine does work on an external system, and the steam leaves the turbine at 100°C. The efficiency of the steam engine is 5%. The relevant physical principle is the first law of thermodynamics
a. True b. False Indicate whether the statement is true or false
Which of the following screwdrivers would likely be the most effective to loosen a stubborn screw? Assume the size of the driver head is the same in each case
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When a large galaxy collides with a small galaxy, the smaller galaxy may be pulled apart by tidal forces
Indicate whether the statement is true or false