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A magnetic field is perpendicular to a 0.0387 m x 0.0599 m rectangular coil of wire that has 109 turns. In a time of 0.0525 s, an average emf of magnitude 1.66 V is induced in the coil. What is the magnitude of the change in the magnetic field?
A neon sign requires 10000 V for its operation. It operates from a 220 V receptacle. What must be the turns ratio Ns/Np of the transformer?
In some places, insect "zappers", with their blue lights, are a familiar sight on a summer's night. These devices use a high voltage to electrocute insects. One such device uses an ac voltage of 4360 V, which is obtained from a standard 120 V outlet by means of a transformer. If the primary coil has 18 turns, how many turns are in the secondary coil?
Calculate the direction of the average force on the ball during the contact . The magnitude of the average force is 4700N
A physics book slides off a horizontal table top with a speed of 1.00m/s. It strikes the floor after a time of 0.390ss, Find the height of the table top above the floor
A projectile is shot on level ground with a horizontal velocity of 18 m/s and a vertical velocity of 41 m/s, Find the time the projectile is in the air. The acceleration due to gravity is 9.8 m/s2
Two Styrofoam balls with the same mass m = 7.7 10-8 kg and the same positive charge Q are suspended from the same point by insulating threads of length L = 0.92 m. The separation of the balls is d = 0.027 m. What is the charge Q?
Suppose the pressure of the gas equals to p=aV^2, where a is constant. Find the heat transfer to the gas during this process if this is a reversible change.
A 2.00 µC charge is experienced by 0.438 N force in an electric field. What is the magnitude of the electric field?
During a crash test, a car moving at 60 km/ hr collides with a rigid barrier and comes to a complete stop in 200 ms.
A 0.50 kg ball that is tied to the end of a 1.30 m light cord is revolved in a horizontal plane with the cord making a 30° angle, with the vertical. If the cord can withstand a maximum tension of 9.5 N, what is the highest speed at which ball can ..
Suppose you have an electric hot water heater for your house which is an aluminum cylinder which has a 0.44 m radius and is 1.8 m high. The walls are 1.0 cm thick.
Sodium Chloride gas has molecules that are ionically bonded. The Sodium end has a charge of +1e, calculate the dipole moment
In a popular amusement park ride, the rotating cylinder of radius 3.0 m is set in rotation at an angular speed of 7.0 rad/s. The floor then drops away, leaving the riders suspended against the wall in a vertical position.
An ideal spring is lying horizontally on a frictionless surface, find the oscillation frequency of a 2.5 kg blcok under the same circumstances
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