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A very short solenoid contains N = 20 circular loops of wire. The radius of the loop is R = 0.5 meters, and the length of the solenoid is d = 0.02 meters. Approximately what is the magnetic field in the center of the solenoid?
A 20.00 kg child is on a swing that hangs from 3 m long chains. What is her maximum speed if she swings out to a 45.0 o angle.
An aluminum wire having a cross-sectional area of 4.00 3 1026 m2 carries a current of 5.00 A. Find the drift speed of the electrons in the wire
A man drags a 71.5-kg crate across the floor at a constant velocity by pulling on a strap attached to the bottom of the crate. Find the magnitude of the tension in the strap
The head of a rattlesnake can accelerate at 50 m/s^2 in striking a victim. If a car can have the same acceleration, how long would it take for it to reach a speed of 100 km/h from rest.
A Styrofoam box has a surface area of 0.79 m2 and a wall thickness of 2.0 cm. determine the thermal conductivity of the Styrofoam.
suppose that a 70.0kg box is pulled by 400N firce at an angle of 30 degree to the horizontal. The coefficient of sliding friction is 0.500. find the acceleration of the box
If linear momentum is conserved when there is no external force applied, how is angular momentum conserved
One fish leaps with an initial velocity at the water surface of 12.5m/s at an angle of 33.0 degrees above the horizontal
How much current is contained within the width of a thin ring concentric with the wire if the ring has the radial width of 12.0 µm and is at a radial distance of 1.2 mm.
Two stars in a binary system orbit around their center of mass. The centers of the two stars are 7.50 1011 m apart. What is the mass of the smaller star
A parallel plate capacitor consists of two square metal plates of dimension 10 cm by 10 cm. The plates are separted by a distance of .1 mm. how does the capacitance change
A flint glass plate (n = 1.66) rests on the bottom of an aquarium tank. Calculate the apparent thickness of the plate as viewed from above the water
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