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An ideal heat engine operates at a thermal efficiency of 25% when the high temperature reservoir operates at a temperature of 120C.For the same high temperature reservoir what would the temperature of the low temperature reservoir require to be for the engine to have a thermal efficiency of 50%?
An uncharged capacitor is connected to the terminals of a 4 battery, and 12 flows to the positive plate. The 4 battery is then disconnected and replaced with a 7 battery, with the positive and negative terminals connected in the same manner as bef..
A certain nuclear power plant is capable of producing 1.3×109 W of electric power. How much mass is converted per hour if the efficiency of the plant is 29 percent
Two identical +9.5 uC point charges are initially 3.5cm apart from each other. If they are released at the same instant from rest, how fast will each be moving as they are very far away from each other? Assume they have identical masses of 1 mg.
Did you firm earn profit or incurred loss at the end and make a small comment on your financial position at the end.
A mass less plank 5.00 meter long is supported at its ends by two ropes. Determine the tension in the two ropes
what formula do i use to find electric potential? units? what formula do i use to find potential energy? units? if you
what are the currents that the block can carry
Near the surface of the Earth, a beanbag is thrown at an angle ? = 45? from the top of a building a height h above the ground, what was the initial speed of the beanbag
question1a lunar landing craft approaches the moonrsquos surface. suppose that one-third of itsnbspweight is fuel that
Determine the energy levels of positronium "atom" consisting of a positron (antielectron charge +e) and an electron rotating about their common center of mass
A physical pendulum is made by drilling a hole through a uniform wooden disk of radius R a distance (alpha)*R from the disk's center. What must alpha be to miniumze the disk's period of oscillation
A cart mass M moves on a frictionless track. It is attached to a string, which goes over a pulley wheel & has a mass m hanging from it. At t=0 s the cart starts from rest & accelerates. Find the tension in the sting & acceleration of the cart.
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