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A positively charged rubber rod is moved close to a neutral copper ball that is resting on a nonconductin sheet of plastic. (a) Show how the charges are arranged on these spheres if they are very far from each other. (b) If the sphere's are now broght close to each other, but do not touch, sketch how the charges will be distributed on their surfaces. (c) In part (b), show how the charges would be distribued if both spheres were negative.
He pulls on a rope that is fastened to the platform and runs over a pulley on the ceiling. Illustrate with what force does he have to pull in order to give himself and the platform an upward acceleration of 1.0 m/s^2?
The potential at location A is 376V. A positively charged particle is released there from rest and arrives at location B with a speed vB.
The current in a series circuit is 6.0 A. When an additional 17.0 resistor is inserted in series, What is the resistance in the original circuit
A metal must absorb radiation with a minimum frequency of 1.94 e15 Hz before it can emit an electron from its surface via the photoelectric effect, find the speed of the photo-electrons
An irregularly shaped body of mass 1.50 kg is mounted on an axle located 21.0 cm from the center of gravity of the body. Find the body's moment of inertia about this axis
question1a 23-g bullet travelling 285ms penetrates a 4.5kg block of wood and emerges cleanly at 230ms. if block is
In a large centrifuge used for training pilots and astronauts, a small chamber is fixed at the end of a rigid arm that rotates in a horizontal circle. How long is the arm of the centrifuge
Two large, parallel, conducting plates are 26cm apart and have charges of equal magnitude and opposite sign on their facing surfaces. An electrostatic force of 2.8 x10-15 N acts on an electron placed anywhere between two plates.
The working substance of an engine is 1.00 mol of diatomic gas. The engine operates in a cycle consisting of three steps, Find the efficiency of this cycle
What is the magnitude of the electric field 19.7 cm directly above an isolated 3.25×10^?5 C charge? What is the direction of the electric field? Downward or upward?
An astronomer on earth observes two galaxies moving away from each other along a line that passes through the earth. At what speed are the galaxies moving apart relative to each other?
What is the relationship between the light emitted by an atom and the energies of the electrons in the atom?
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