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An unstrained horizontal spring has a length of 0.36 m and a spring constant of 290 N/m. Two small charged objects are attached to this spring, one at each end. The charges on the objects have equal magnitudes. Because of these charges, the spring stretches by 0.037 m relative to its unstrained length. Describe (1) the possible algebraic signs and (2) the magnitude of the charges.
Nichrome wire of cross-sectional radius 0.791 mm is to be used inwinding a heating coil. If the coil must carry a current of9.25 A when a voltage of 1.20x102 V is applied acroosits ends, find a) the required resistance of the coil and b) the lengt..
two styrofoam balls each with a mass of 335 mg and carrying the same electric charge are suspended from a common point
A 190 rad dose of radiation is administered to a patient in an effort to combat a cancerous growth. Calculate the amount of energy delivered per unit mass
An electron is located on a pinpoint having a diameter of 2.5 um. What is the minimum uncertainty in the speed of the electron
An object is 22 cm in front of a diverging lens that has a focal length of -13 cm. How long in front of the lens should the object be placed so that size of its image is reduced by a factor of 4.
A child, hunting for his favorite wooden horse, is running on the ground around the edge of a stationary merry-go-round, Find the shortest time it takes for the child to catch up with the horse
as a physics demonstration a fire syringe is used to demonstrate the high temperatures that can be reached inside a
A 38.0-kg child swings in a swing supported by two chains, each 3.08 m long. The tension in each chain at the lowest point is 426 N. Find the force exerted by the seat on the child at the lowest point
A charging bull elephant with a mass of 5240 kg comes directly toward you with a speed of 4.55m/s. You toss a 0.150 kg rubber ballat the elephant with a speed of 7.81 m/s.
How many electrons are transferred. What is the smallest thickness of a soap film that would appear black if illuminated with 490 light? imagine there is air on both sides of the soap film.
What must be the orbital speed of a satellite in a circular orbit 800 above the surface of the earth
a pair of speakers seperated by .7m are driven by the same oscillator at a frequency of 690 hz. an observer originally
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