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A box that weighs 575 N is lifted a distance of 20.0 m straight up by a cable attached to a motor. The job is done in 10.0 s. What power is developed with the motor in watts and kilowatts?
Two parallel plates of area 51 cm.^2 have equal but opposite charges of 4.10E-07 C. Find the dielectric constant of the material
A thin rod consists of two parts joined together. One third of it is silver and two-thirds is gold. The temperature decreases by 24C°.
A 10.39-m ladder with a mass of 24.8 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 264 N. What is the net torque acting on the ladder
Radioactive isotopes frequently occur together in mixtures. Assume a 400g sample contains, with a half-life of 12 days, and, with a half-life of 4.5 days. If there are firstly twice as many calcium atoms as there are barium atoms, what will be the ra..
A current of 17.0 mA is maintained in a single circular loop of 1.50 m circumference. Find the magnitude of the torque exerted by the magnetic field on the loop
A nearsighted person wears glasses to correct the problem. The lenses in the glasses have a focal length of -520 cm, How far from the eyes is the person's far point located
A light beam is incident on heavy flint glass (n=1.65) at the polarizing angle. Angle of refraction is 31.22 degrees. determine the change in the intensity
Calculate the average induced voltage between the tips of the wings of a Boeing 747 flying at 1000 km/hr above East Lansing. The downward component of the earth's magnetic field at this place is 0.7·10-4 T. (DATA: Assume that the wingspan is 60 meter..
A hydrolic lift (starting with both pistons at the same height) isused to jack a 970kg car 12cm off the floor in steps. The diameterof the output (lift) piston is 18cm and the input force is250N.
The punter on a football team tries to kick a football so thatit stays in the air for a long "hang time." what is the hangtime
A 103 gram granite cube slides down a 40 degree frictionless ramp. Find how high above the table should the granite cube be released
A block of mass 50kg is pushed 20m along a frictionlesssurface by a constant horizontal force of 60N, What is the net work done on the block
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