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A heat engine operates in a Carnot cycle between reservoirs of temperatures 1000K and 400K. It is found to discharge 20 J of heat per cycle to the cold reservoir. What is the work output per cycle?
A parachutist descending at the speed of 25 m/s loses a shoe at an altitude of 50 m. (Assume the positive direction is upward.)
A 4 kg dog stands on one end of a 20 kg boat. The dog is initially 6 m from the shore, How far has the boat moved after the dog has walked the 2m
Cowboy Joe wishes to shoot his assailant by ricocheting a bullet off the mirrored metal plate. To do so, should he simply aim at the mirrored image of his assailant.
Consider a circuit. The three resistors are identical with R1 = R2 = R3= 160 ?, and the battery voltage is 50 V. What is the current through resistor R2?
a 1.0 point charge is 15m from a second point charge, what is the magnitude of the second charge?
A 50 kg person is riding a Ferris wheel. The Ferris wheel consists of 8 metal cars, each with mass 1500 kg located 15 m from the center. What is the angular acceleration of the Ferris wheel
To save on heating costs, the owner of a green house keeps 680 kg of water around in barrels. What is the minimum ampere rating of an electric heating system (240 V) that would provide the same heating effect as the water does
A charge of -3.55 nC and a charge of -5.65 nC are unconnected by a distance of 60.0 cm. Find the position at which a third charge of +7.20 nC can be located so that the net electrostatic force on it is zero.
A hydrogen atom is in its ground state when its electron absorbs a 48 keV photon. What's the energy of the resulting free electron
A square with ½-meter long sides has +1 nC at the top left corner, +2 nC at the bottom right corner, Calculate the components of the Electric field at the top left corner add each contribution separately
Find out the magnitude of the velocity of the heavier fragment relative to the ground just after explosion.
A 1.5 m^3-volume tank holds oxygen gas (M = 32 g/mole) at the pressure of 500,000 Pa. The temperature is 27 C. Find the mass of oxygen in the tank (in kg)
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