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Four point charges, each having a charge with a magnitude of 1.5 µC, are at the corners of a square whose sides are 6 m long. Find the electrostatic potential energy of this system under the following conditions.
(a) all of the charges are negative?
(b) three of the charges are positive and one of the charges is negative?
(c) the charges at two adjacent corners are positive and the other two charges are negative?
(d) the charges at two opposite corners are positive and the other two charges are negative (Assume the potential energy is zero when the point charges are very far from each other.)
An advertisement shows a 1239 kg car slowly pulling at constant speed a large passenger airplane to demonstrate the power of its newly-designed 79.7-hp (horsepower) engine, How much work is performed by the car on the airplane during this time
A crate of mass 12.5 kg is pulled up a rough incline with an initial speed of 1.50 m/s. The pulling force is 100 N parallel to the incline, What is the change in kinetic energy of the crate
suppose that a basketball league has 32 teams split into two conferences of 16 teams each. each conference is split
A playground merry-go-round of radius R = 1.20 m has a moment of inertia I = 275 kg · m2, What is the new angular speed of the merry-go-round
A proton at speed v=3.20*105 m/s orbits at a radius of 2.4 cm outside a uniformly charged sphere. Determine the total charge on the sphere
An observer in frame S standing at the origin observes two flashes of colored light separated spatially by ?x = 2980 m, Find the magnitude and direction of v.
A 30 kilogram child moving at 4 meters per second jumps onto a 50 kilogram sled that is initially at rest on a long, frictionless, horizontal sheet of ice determine the speed of the child sled system after the child jumps into the sled.
A father pushes horizontally on his daughter's sled to move it up a snowy incline, as illustrated in the figure, with h = 3.8 m and ? = 18°. how much work is done by the father in moving it from the bottom to the top of the hill
Light of wavelength 550nm in a vacuum is found to travel at 1.96*10^8m/s in a certain liquid. Determine the index of refraction of the liquid
A free fall acceleration onthe surface Mars is about three eights of that on the surface of Earth. Find the ratio of there average densities
Why three points? Would two have been enough? Describe what changes would occur, if any, in the electric field pattern and in the equipotential curve you measured if the magnitudes of your three charges were increased, all by the same factor.
A thin layer of fluid to be identified by its index of refraction is poured into a very shallow container. what are the possible values for the index of refraction
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