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An air-filled parallel plate capacitor with a plate spacing of 1.30 cm has a capacitance of 6.40 μF. The plate spacing is now doubled and a dielectric is inserted, totally filling the space among the plates. As a result the capacitance becomes 12.7 μF. Compute the dielectric constant of the inserted material.
A 1.5 V battery is rate at 1,800 milliamp hrs (mAh). How much electrical energy (in joules) is stored in the battery when it is new
At the instant the traffic light turns green, a car that hasbeen waiting at an intersection starts ahead with a constantacceleration of 3.55 m/s^2. How fast is the car traveling when it overtakes the truck
Vertically polarized light with an intensity of .60 W/m^2 passes through a polarizer whose transmission axis is at an angle of 35 degrees with the vertical
A ladder of length L = 2.6 m and mass m = 20 kg rests on a floor with coefficient of static friction %u03BCs = 0.54. What is the normal force the floor exerts on the ladder
a steel rod 2.00 m long is to be used to pry up one end of a 400-kg crate. if a workman can exert a downward force of
2.00 mol of a monaromic gas at atmospheric pressure has a total internal energy of 7.48x10^3J. What is the volume occupied a rigid cylinder by the gas
Two children hang by their hands from the same tree branch. The branch is straight, and grows out from the tree at an angle of 33° above the horizontal. What is the magnitude of the net torque exerted on the branch by the children
A block with mass m =7.5 kg is hung from a vertical spring. When the mass hangs in equilibrium, the spring stretches x = 0.25 m. what is the magnitude of the net force on the block
An artificial satellite circles the Earth in a circular orbit at a location where the acceleration due to gravity is 5.84 m/s2
If the elevator's descending speed is measured at 10 m/s at a given point, but its speed is decreasing by 2.7 m/s2, what is a force exerted by the scale.
Two charges are placed on the x axis. One of thecharges (q1 = +5.89C) is at x1 = +3.00 cm and the other(q2 = -27.0C) is at x2 = +9.00 cm. Find the netelectric field (magnitude and direction given as a plus or minussign) at (a) x = 0 cm and(b) x = +6...
The magnetic potential energy stored in a certain inductor is 22.5 mJ when the current in the inductor is 57.5 mA. Compute the inductance. What current is required for the stored energy to be 150 mJ?
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