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A vacuum cleaner is connected to a 120V socket and uses 3.0 A when the back emf generated by the electric motor is 72 volts. What is the resistance of the coil in the motor?
If you wrapped a wire 1000 times around a hollow cylinder that was 10 cm long, and forced 4.0 amps of current through this solenoid, what would the strength of the magnetic field be
A highway curve with a radius of 550 m is banked properly for a car travelling 130 km/h. If a 1660- kg Porshe 928S rounds the curve at 250 km/h, how much sideways force should the tires exert against the road if the car does not skid.
A grindstone of radius 4 m is initially spinning with an angular speed of 8 rad/s. The angular speed is then increased to 10 rad/s over the next 4 seconds. Imagine that the angular acceleration is constant.
A rifle with a barrel length of 58 fires an 11 bullet with a horizontal speed of 370. The bullet strikes a block of wood and penetrates to a depth of 15.
A flint glass plate (n = 1.66) rests on the bottom of an aquarium tank. Calculate the apparent thickness of the plate as viewed from above the water
Find the radical acceleration at the edge of a phonograph record of radius 0.15 m rotating at 78 rev min^-1. B.) The record comes to a stop with a uniform angular acceleration in 2 s. Find the tangential acceleration at the edge and the angular accel..
A 90.0-kg fullback running east with a speed of 5.00 m/s is tackled by a 95.0-kg opponent running north with a speed of 3.00 m/s. Where did the lost energy go
q1. at the point of fission a nucleus with 98 protons is divided into two smaller spheres each with 49 protons and a
A boy scout ‘s girl scout girlfriend to test his scouting abilities has hidden her girl scout cookies somewhere in the forest and has given him the directions to retrieve them, How far away are the cookies
A magnesium surface has a work function of 3.68 eV. Calculate the maximum kinetic energy of the ejected electrons
Two cars approaching each other collide and stick together after the collision. One car has a mass of 1820 kg and a speed of 30 km/h in the positive x direction. find the initial velocity of the second car
A 5.0 deep swimming pool measures 30 by 16. What force does the water exert on the bottom of the pool
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