= Two charges are placed on the x axis. One of the charges (q₁ +8.04 μC) is at x₁ = +3.00 cm and the other (92 = -20.3 μC) is at x₂ = +9.00 cm. Find the net electric field (magnitude and direction given as a plus or minus sign) at (a) x = 0 cm and (b)x= +6.00 cm.

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9) A person in good physical condition can put out 100 W of useful power for several hours at a stretch, perhaps by pedaling a mechanism that drives an electric generator. Neglecting any problems of generator efficiency and practical considerations such as resting time, answer the following.   (a) How many people would it take to run a 3.00 kW electric clothes dryer? _____ people   (b) How many people would it take to replace a large electric power plant that generates 800 MW?  _____people

Given a force-displacement graph, calculate the total work.

One engine works with constant power P and the other one increases its power linearly with time. What is the ratio of the work done by the engines (engine two to engine one) if the second engine increased its power from zero to 5.6 P during the observed time?

Use the dimensional analysis to determine the nature and the unit in BE of the unknown quantity Z, if EK = Z x d where EK is the kinetic energy and d is the distance.