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An emf of 10 V is applied to a coil with an inductance of 40 mH and a resistance of 0.50 Ω. Determine the energy stored in the magnetic field when the current reaches one half of its maximum value
A flywheel is rotating initially with an angular velocity of 3.0 rad/s clockwise. Sometime later it is rotating with an angular velocity of 8.0 rad/s counterclockwise. What is the direction of the angular acceleration
A uniform board is leaning against a smooth vertical wall. The board is at an angle (theta) above the horizontal ground. Find the smallest value for the angle (theta), such that the lower end of the board does not slide along the ground.
Find the magnitude and the direction of the field at the following points : (a) the origin (b) x = 0.2m, y = 0 (c) x = 0.1m, y = 0.15m; (d) x = 0, y = 0.1m.
Two circular disks spaced 0.50 mm apart form a parallel-plate capacitor. What are the diameters of the disks
A 5-year old has nothing better to do than to connect three capacitors to a voltage source as shown. What is the total energy stored in the capacitors?
You have a 1.7 long copper wire. You want to make an N-turn current loop that generates a 1.6 magnetic field at the center when the current is 2.5, What will be the diameter of your coil
A uniform spherical shell of mass M = 2.5 kg and radius R= 18.0 cm rotates about a vertical axis on frictionless bearings. A mass less cord passes around the equator of the shell, over a pulley of rotational inertia I = 3.63×10-3kg m2 and radius r = ..
two identical capacitors store different amounts of energy capacitor a stores1.3x 10-3j and capacitor b stores3.3x
a rifle with a weight of 30 n fires a 5.0g bullet with a speed of 300ms. if a 700 n man holds the rifle firmly against
Kathy Kool buys a sports car that can accelerate at the rate of 5.20 m/s2. She decides to test the car by racing with another speedster, Find the time it takes Kathy to overtake Stan
Two equally charged spheres of mass 1.0 g are placed 2.0 cm apart. When released, they begin to accelerate at 655m/s^2. What is the magnitude of the charge on each sphere
He took 4.00 mL of the solution then diluted it with water to give 275 mL of a final solution. How many moles of NO3-1 are there in the final solution?
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