For an RLC ac circuit, the rms current is 10 A. If the impedance is 12 k? when the voltage leads the current by 39°, find the average power of the circuit
A) 47 kW B) 93 kW C) 190 kW D) 930 kW
D
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The striking gap between Saturn's A and B rings is called the ________
Fill in the blank(s) with correct word
The lateral magnification for a flat mirror
a. is a function of the object distance. b. is a function of the image distance. c. is a function of the object and image distance. d. is 1.
Matter Waves: Protons are being accelerated in a particle accelerator. When the energy of the protons is doubled, their de Broglie wavelength will
A. increase by a factor of 4.
B. increase by a factor of 2.
C. decrease by a factor of 2.
D. increase by a factor of 
.
E. decrease by a factor of 
.
A racquetball is dropped from a height of one meter. It bounces off the floor and rises to a height of 0.8 m. The collision with the floor was
A. an elastic collision. B. a perfectly inelastic collision. C. a partially inelastic collision. D. impossible to tell without knowing the mass of the ball.