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Get the potential energy of a current-carrying loop in a B field that has a uniform over the face area of the loop. The work an external agent would have to perform to change the orientation of a loop in the B field, originally at rest with the loop plane perpendicular to the field, is stored as PE of the loop-field system. Allow an angle of 90 degrees to serve as a reference position for U=0 and discover the expression for U(θ).
Under certain conditions, the human body can withstand an acceleration of 10 g's. What is the net force (in Newtons) acting on a person
A 4.0kg block is suspended from a spring with force constant of500N/m. Find the amplitude of the resulting simple harmonic motion
energy may be stored for use during peak demand by pumping water to a high reservoir when demand is low and then
What was the bullet's flight time. A marble is thrown horizontally with a speed of 11 m/s from the top of a building. When it strikes the ground, the marble has a speed that makes an angle 38° with the horizontal. From what height above the ground..
A 0.19-kg stone is held 1.4 m above the top edge of a water well and then dropped into it, What is the change in gravitational potential energy of the system from release to reaching the bottom of the well
Alice made a telephone call from her home telephone in New York to her fiance stationed in Baghdad, about 10,000km away, Estimate the time taken for signals sent by telephone cable
A thick spherical shell of charge Q and uniform volume charge density ? is bounded by radii r1 and r2, where r2 > r1. With V = 0 at infinity, find the electric potential V as a function of the distance r from the center of the distribution, consid..
a laser positioned on a ship is used to communicate with a small two man research submarine resting on the bottom of a lake. How far is the submarine from the side of the ship
I place a 250 g mass on a spring. When it has finished oscillating, the spring has extended from 30 cm to 55cm. How do I calculate how far it has extended from its equilibrium? For the 250 g mass, what is the force exerted by gravity on this mass? Wh..
A boy flies a kite with the string at a 30 degree angle to the horizontal. The tension in the string is 4.5N. How much work does the string do on the boy
A parallel-plate air capacitor is made from two plates 0.205m square, spaced 0.830cm apart. It is connected to a 120 V battery. What is the energy stored in the capacitor
A 5.3m wire with a mass of 82g is attached to the mast of a sailboat. If the wire is given a "thunk" at one end, it takes0.095s for the resulting wave to reach the other end. What is the tension in the wire?
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