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A long horizontal wire carries a current of IT = 49.1 A. A second wire (I), made of 2.40 mm diameter copper wire and parallel to the first but L = 12.0 cm below it, is held in suspension magnetically. (This means the upwards magnetic force on that lower wire is just large enough to hold it up against its own weight) What is the current in the lower wire (Use right as the positive direction)? (The density of copper is 8.9E3 kg/m3.)
you perform a double-slit experiment in order to measure the wavelength of the new laser that you received for your
What should be the spring constant of a spring designed to bring a 1500 car to rest from a speed of 80 so that the occupants undergo a maximum acceleration of 5.
A skier starts from rest at the top of a hill that is inclined at 10.2° with the horizontal. The hillside is 150 m long, and the coefficient of friction between snow and skis is 0.0750. At the bottom of the hill, the snow is level and the coefficient..
In an engine, a piston oscillates with simple harmonic motion so that its position varies according to the expression, x = 8.00 cos 3t + ? 4 where x is in centimeters and t is in seconds. (a) At t = 0, find the position of the piston.
In case A, a metal bullet penetrates a wooden block, In case B, a rubber bullet with the same initial speed and mass, bounces off of an identical wooden block. Will the speed of the bullet in case B after the collision be or = of speed just before ..
In diving to a depth of 983 m, an elephant seal also moves 693 m due east of his starting point. What is the magnitude of the seal's displacement
A Two balloons of identical volume (radius 11.5 m) are filled with gas. The first with helium, the second with hydrogen (H2) gas. What is the lift created by each one
A space craft with a mass equal to .25*(mass of moon) is in orbit about the sun with a period of 3 years. calculate the average radius of the space craft's orbit. (the distance from the space craft to the sun).
A box of mass 12.0 kg is sitting on the floor of an elevator which is accelerating upwards at 5.1 m/s2. If the coefficient of static friction between the box and the floor if 0.30, what is the minimum horizontal force needed to just start moving the ..
A solid uniform 3.25kg cylinder, 60.0cm in diameter and 12.4cm long, is connected to a 1.50kg weight over two massless frictionless pulleys, How fast is the cylinder turning at this instant
question waves on a stick a flexible stick 2.0 m long is not fixed in any way and is free to vibrate. make clear
A spring (k = 866 N/m) is hanging from the ceiling of an elevator, and a 7.3-kg object is attached to the lower end. By how much does the spring stretch
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