An alternating current circuit has resistance R, inductance L and capacitance C in series with a voltage source. Which statement is correct?
a. The voltage across the capacitor leads the voltage across the inductor by 90°.
b. The voltage across the inductor leads the voltage across the capacitor by 90°.
c. The voltage across the inductor leads the voltage across the resistor by 180°.
d. The voltage across the inductor is out of phase with the voltage across the capacitor by 180°.
e. Both voltages lead the voltage across the resistor by 90°.
d
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If you increase the linear mass density of a rope, the speed of a wave on the rope also increases
a. True b. False Indicate whether the statement is true or false
A proton is circling the Earth above the magnetic equator, where Earth's magnetic field is directed horizontally north and has a magnitude of 4.00 × 10^–8 T. If the proton is moving at a speed of 2.7 × 10^7 m/s, how far above the surface of the Earth is the proton? Earth's radius is 6.38 × 10^6 m, a proton's mass is 1.67 × 10^–27 kg, and its charge is 1.6 × 10^–19 C
a. 7.05E+6 m b. 1.34E+7 m c. 1.03E+8 m d. 6.65E+5 m
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An ideal spring stretches by 21.0 cm when a 135-N object is hung from it. If instead you hang a fish from this spring, what is the weight of a fish that would stretch the spring by 31cm
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