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A fully charged capacitor with a voltage of 270 kV is discharged through a resistor.
a) What is the voltage across the capacitor at the end of three time constants?b) At this time, what is the voltage across the resistor?
A 2g marble is fired vertically upward using a springgun. what is the spring constant
A man sits on the south bank of a 100m wide river that flows due east at 2m/s. The man can swim 3m/s, How long will it take him to cross
A large turntable rotates about a fixed vertical axis, making one revolution in 5.00 s. What is the angular speed of the turntable when the child is 2.50 from the center, assuming that you can treat the child as a particle
A lighthouse that rises 49 above the surface of water sits on a rocky cliff that extends 19 from its base. A sailor on the deck of a ship sights the top of the lighthouse at the angle of 30.0 above the horizontal.
If the inside of the vessel is maintained at atmospheric pressure 1.013 × 105 Pa, what is the net force on a porthole of diameter 16.9 cm
A sailor strikes the side of his ship just below the waterline. Hehears the echo of the sound reflected from the ocean floor directlybelow 1.87 s later. How deep is the ocean at this point?
One mole of gas obeys van der waal's equation of state and allowed to expand isothermally from v1 to v2. Derive equation for the change in Gibbs free energy for such expansion.
two ships a and b leave port at the same time. ship a travels northwest at 20 knots and ship b travels at 28 knots in a
A playground ride consits of a disk of mass M = 47kg and radius R = 1.6 m mounted on a low friction axle. A child of mass m = 18kg runs at speed v =2.7 m/s on a tangential to the disk and jumps onto the outer edge of the disk.
A 9.8 kg object oscillates at the end of a vertical spring that has a spring constant of 1.9 * 10^4 N/m. The effect of air resistance is represented by the damping coefficient b= 3.00 Ns/m.
An electric motor is plugged into a wall socket and is running at normal speed. Suddenly, some dirt prevents the shaft of the motor from turning quite rapidly. What happens to the back emf of the motor, and what happens to the current that the mot..
A 12 kg mass starts from rest and slides down an inclined plane 8.0 10-1 m long in 0.9 s. What net force is acting on the mass along the incline?
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