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A vertical straight wire carrying an upward 24-A current exerts an attractive force per unit length of on a second parallel wire 7.5 cm away.A) What current (magnitude) flows in the second wire??B) What current (direction) flows in the second wire??
A constant-pressure insulated piston-cylinder device contains 1.7 kg of saturated liquid-vapor mixture of water at 150 kPa with an initial quality of 0.2. Calculate the change in energy of the contents
A recording engineer works in a soundproofed room that is 50.0 dB quieter than the outside. what is the intensity outside
Water at a pressure of 3.2 atm at street level flows into an office building at a speed of 0.5 m/s through a pipe 5.6 cm in diameter. Calculate the water pressure in such a pipe on the top floor
A shopper walks from the door of the mall to her car 250m down the line of cars, and then turns 90 degrees to the right and walks an additional 60 meters. What is the magnitude of the displacement of her car from mall door.
the speed with which hair or fingernails grow. what is the average speed of growth? What units are most appropriate for describing this speed
A 37-kg girl is bouncing on a trampoline. All through a certain interval after she leaves the surface of the trampoline, her kinetic energy decreases to 215 J from 430 J. How high does she rise during this interval? Avoid air resistance.
A 7.5 nC charge is located 1.8m from a 4.2 nC charge. Find out the magnitude of the electrostatic force that one charge exerts on the other. Is the force attractive or repulsive.
A circular loop of radius 2.58 cm contains 65 turns of tightly wound wire. what torque acts on the loop
An automobile tire has a radius of 0.330 m, and its centre moves forward with a linear speed of v= 15.0 m/s. Find the angular speed of the wheel.
Joe pushes down the length of the handle of a 12.6 kg lawn spreader. What force must Joe apply to the handle
Describe the motion of a ball in a bus when the bus accelerates foward as it might be perceived by a person standing on the ground outside the bus
A transformer is to be used to provide power for a computer disk drive that needs 7.0 V (rms) instead of the 120 V (rms) from the wall outlet. Find the number of turns in the secondary
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