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A circuit consists of an ideal ac generator, a 30 µF capacitor, and an 75? resistor, all connected in series. The output of the generator has a peak emf of 20 V, and the armature of the generator rotates at 300 rad/s.
(a) Find the power factor.
(b) Find the rms current.
(c) Find the average power supplied by the generator.
A ten pound car wheel has a moment of inertia of 0.38 kg m2. What is the wheel's rotational kinetic energy
A 8.0 W laser beam shines on an ensemble of 10^24 electrons, each in the ground state of a one-dimensional infinite square well 0.80nm wide. How many electrons can be so excited if the beam shines for 15 ms
Flux and nonconducting shells. A charged particle is suspended at the center of two concentric spherical shells that are very thin and made of nonconducting material. Figure (a) shows a cross section. Figure (b) gives the net flux ? through a Gaussia..
A platform is rotating with an angular speed of 3.00 rad/s and an angular acceleration of 11.0 rad/s2. what is the magnitude of the total acceleration a
A jeweler working with a heated 47 g gold ring should lower the ring's temperature to make it safe to handle. If the ring is initially at 99 degrees Celcius, what mass of water at 25 degrees Celcuis is needed to lower the ring's temperature to 38 ..
A clay vase on a potter's wheel experiences an angular acceleration of 7.70 rad/s2 due to the application of a 10.7-N · m net torque
An electronic attachment for camera produces flash by usingenergy stored in 880&10-6 F of capacitor, Determine the value of resistance
An open flask sitting in a lab fridge looks empty, but we know that actually it is filled with a mixture of gasses called air. how many gas molecules does the flask contain
Estimate the rms electric field in the sunlight that hits Saturn, knowing that the Earth receives about 1350 W/m2
find out the magnitude of the gravitational force exerted.
Amtrak's 20th-Century Limited is en route from Chicago to New York at 120km/h, How far was the train from the cow when the engineer first applied the brakes
Two trains, each having a speed of 30 km/h are headed at each other on the same straight track. A bird can fly 60km/h flies off the front of one train when they are 60 km apart and heads directly back to the first trains and so forth, what's the tota..
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