A mass is connected by a light string that passes over a pulley of mass M to a mass as shown in the figure. Both masses move vertically and there is no slippage between the string and the pulley. The pulley has a radius of 20.0 cm and a moment of inertia of 1?2 If is 3.00 kg, is 6.00 kg and M is 4.00 kg, then what is the tension in the string that is attached to mass

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A. 20.8 N

B. 27.4 N

C. 30.2 N

D. 37.4 N

E. 43.5 N


D. 37.4 N

Physics & Space Science

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If an electric field is applied to a metal

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A heat engine absorbs 2 500 J of heat from a hot reservoir and expels 1 000 J to a cold reservoir. When it is run in reverse, with the same reservoirs, the engine pumps 2 500 J of heat to the hot reservoir, requiring 1 500 J of work to do so. Find the ratio of the work done by the heat engine to the work done by the pump. Is the heat engine reversible?

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A long wire is known to have a radius greater than 4.0 mm and to carry a current uniformly distributed over its cross section. If the magnitude of the magnetic field is 0.285 mT at a point 4.0 mm from the axis of the wire and 0.200 mT at a point 10 mm from the axis, what is the radius of the wire?

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