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Two point charges are located on the x axis. The First is a charge +Q at x = -a. The second is an unknown charge located at x = +3a. The net electric field these charges produce at the origin has a magnitude of 2kQ/a2. What are the two possible values of the unknown charge?
A chemistry student with a mass of 75 kg is riding a steadily moving Ferris wheel. What would the normal force be on the student at the top of the wheel if the wheel's velocity were doubled
A bungee cord is stretched between two poles with a force of 407 N. What is the velocity of a wave on this bungee cord
An FM radio station of frequency 96.7 MHz puts out a signal of 29900 W. How many photons per unit time are emitted
An archer shoots an arrow toward a 300-g target that is sliding in her direction at a speed of 2.20 m/s on a smooth, What is the speed of the arrow after passing through the target
A compressed-air cylinder stands 96.0 cm tall and has internal diameter 21.0cm cm . At room temperature, its pressure is 161 atm. How many moles of air are in the cylinder
A circular coil of wire of 200 turns and diameter 3 cm carries a current of 3 A. What is the torque on the coil
An object of mass 2 kg and charge 40 microC is moving with initial speed of 5 m/s towards a fixed point charge of 30 microC which is fixed. Find the position of the object when it comes to rest
During the launch from a board, a diver's angular speed abouther center of mass changes from zero to 7.00 rad/s in 310 ms. what was the magnitude of heraverage angular acceleration
A charge of +q is located at the origin, while an identical charge is located on the x axis at x = 0.54 m. Where should the third charge be located
The meter detects the reflected sound waves and measures a beat frequency of .30X10^5Hz. Determine the speed of the baseball
A 13 kg dog is standing on the edge of astationary, frictionless turntable of rotational inertia 95kg·m2 and radius 2.05 m.The dog walks once around the turntable. What fraction of a fullcircle does the dog's motion make with respect to the ground?
A toy cannon uses a spring to project a 5.30 g soft rubber ball. The spring is originally compressed by 5.00 cm, At what point does the ball have maximum speed
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