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Imagine you take a parallel-plate capacitor and double the charge on each plate. What happens to the "capacitance"?
You and a close friend stand facing each other. You are as close as you can get without actually touching. If a wire is attached to each of you, you can act as a capacitor. Estimate (order of magnitude is sufficient) the capacitance of this "human capacitor".
A 4m length of light nylon cord is wound around a uniform cylindrical spool of radius 0.50 m and mass 1 kg. The spool is mounted on a frictionless axle and is initially at rest. The cord is pulled from spool with a constant acceleration of magnitu..
W hat is the magnitude of an average force exerted on the superball by the sidewalk. what is force caused by the water on the bottom.
An object 5.00 mm tall is placed 6.00 cm to the left of a converging lens of focal length 20.0 cm. How far away from the lens is the image formed
A 1.5 kg copper block is given an initial speed of 3 m/s on a rough horizontal surface. Because of friction, the block finally comes to test. If the block absorbs 85% of its kinetic energy, calculate its increase in temperature.
A sledge loaded with bricks has a total mass of 17.2 kg and is pulled at constant speed by a rope inclined at 20.3° above the horizontal. What is the mechanical energy lost due to friction
A wave source generates circular waves that spread out from it on the surface of a pond. The wavelength of these waves is 6.00 cm. (a) At some instant a crest is passing point A.
An ice-making machine inside a refrigerator operates in a Carnot cycle. It takes heat from liquid water at 0.0 degrees Celsius, How much heat |Q_H| is rejected to the room
A 12- V battery causes a current of 0.40A through a resistor. how may joules of energy does the battery lose
Compare the magnitudes of the gravitational force of attraction and the electric force of attraction between the electron, Find the ratio of the electric force to the gravitational force
An electron and a positron, each moving at 3.0 x 10^5m/s, collide head on, disappear, Determine the energy and momentum of each photon
Two objects of the same mass, m = 1.00 kg, are projected towards each other. The first object initially has velocity (20.0m/s)i^. What is the change in kinetic energy in the collision
Two capacitors of capacitance 6.00 microFarad and 8 microfarad are connected in parallel, What is the potential difference across the 6.00-uF capacitor
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