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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.
Suppose a uniformly charged (with a linear charge density) wire starts at point 0 and rises vertically along the positive axis to a length. Determine the x-component of the electric field at point. That is, compute near one end of a long wire, in the..
The flux in a transformer changes at a rate of 0.4 Wb/s. The primary coil has 40 turns and the secondary coil has 500 turns
A 30 kg child is sitting on the outer edge of a 100 kg carousel with a radius of 2.0 m. What is the moment of inertia of the carousel and child
A toy cannon uses a spring to project a 5.34 g soft rubber ball. The spring is originally compressed by 5.09 cm and has a force constant of 7.98 N/m. With what speed does the projectile leave the barrel of the cannon
The drawing shows two situations in which charges are placed onthe x and y axes. They areall located at the same distance of 6.6 cm from the origin O. Foreach of the situations in the drawing, determine the magnitude ofthe net electric field at the o..
A solid sphere is released from rest and rolls down an incline and then into a circular loop of radius R. What is the minimum height h from which the sphere has to be released so that it does not fall off the track when in the loop? N.B. h==2R
A source emits sound uniformly in all directions. There are no reflections of the sound. What is the total sound power P emitted by the source
A baseball player runs 27.4meters from batter's box to first base,overruns first base by 3.0 meters,and then returns to first base. Compared to the total distance traveled by the player,magnitude of the players total displacement from the batters ..
In order to study the long-term effects of weightlessness, astronauts in space must be weighed (or at least "massed"). Find the mass of the astronaut
At an amusement park there is a ride in which cylindrically shapedchambers spin around a central axis. People sit in seats facing the axis, their backs against the outer wall. At one instant the outerwall moves at a speed of 3.5 m/s, and an83 kg pers..
A block of mass .250 kg traveling at (1.0 m/s)y hits a second block with a .375 kg mass travelling at (1.2m/s)x, What is the velocity of the 1st blcok after they hit each other
You drive your 1,465-kg car at a constant speed of 25 mph down a ramp that has a grade of 12 %. Define positive direction in the forward direction
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