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A parallel-plate capacitor has capacitance 9.50µF.
(a) How much energy is stored in the capacitor if it is connected to a24.00V battery?
(b) If the battery is disconnected and the distance between the charged plates doubled, what is the energy stored?
(c) The battery is subsequently reattached to the capacitor, but the plate separation remains as in part (b). How much energy is stored?
A large balloon of mass 222 kg is filled with helium gas until its volume is 335 m3. Assume the density of air is 1.29 kg/m3 and the density of helium is 0.179 kg/m3. Calculate the buoyant force acting on the balloon
A hydraulic lift is lifting a car that weighs 13 kN. The area of the piston supporting the car is A, How far must the small piston be pushed down to raise the car a distance of 1.3 cm
A certain conductor has 6.20 10^28 free electrons per cubic meter, a cross-sectional area of 4.00 10-6 m2, Find the drift speed of the electrons in the conductor
Astronauts discover a planet orbiting another star. The mass of the star is 8.10 x 10^30 kg, what is the force exerted by the star on the planet
The circular top of a can of soda has a radius of 0.029m. The pull-tab has an area of 4.13 10-4m2. The absolute pressure of the carbon dioxide in the can is 1.4 x10^5Pa. Find out the force that this gas generates.
A one-meter long stick ("meter stick") has mass 120 grams, and is hinged at one end (pivot). Calculate the rotational inertia of the stick
Water undergoes viscous flow through two pipes with the same pressure difference between the ends. what is the flow rate through pipe 2
There are 5 pairs of plates: A,B, and D are charged plastic plates and C is an electrically neutral copper plate. A is attracted to B, C to A, C to D, B to D, How can you tell if they attract or do not
A series RCL circuit includes a resistance of 291 ?, an inductive reactance of 685 ?, and a capacitive reactance of 409 ?. What is the voltage of the generator
A car with mass M traveling with speed V has a kinetic energy KE. What is the kinetic energy of a second car that has mass M/2 and travels with speed 2V
A simple pendulum has a mass of 0.150 kg and a length of 1.00 m. It is displaced through an angle of 10.0° and then released. What is the maximum restoring force
The school bus picks up Brian in front of his house and takes him on a straight-line 3.6 km bus ride to school in the positive direction. He walks home after school. If the front of Brian's house is the origin.
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