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In one cycle, a heat engine does 310 J of work and releases 620 J of heat to a lower-temperature reservoir.
(a) How much heat does it take in from the higher-temperature reservoir?
J
(b) What is the efficiency of the engine?
%
A tungsten wire has a radius of 0.070 mm and is heated from 20.0 to 1416 oC. The temperature coefficient of resistivity is ? = 4.5 x 10-3 (Co)-1, How long is the wire
If the police car accelerates uniformly at 3.00m/s^2 and overtakes the speeder after accelerating for 9.00 s, illustrate what was the speeder's speed?
A meteor streaking through the night sky is located with radar, its has moved to point B, Find the x component of its average velocity between A and B
An electron is released a short distance above Earth's surface, the first electron just great enough to cancel the gravitational force on it, How far below the first electron is the second
A sphere of radius 6.21 cm and uniform surface charge density, Find the separation between the point charge and the center of the sphere
If the velocity of the car is increased to 50 km/ hour, what is its kinetic energy. if the velocity is improved to 75 km/ hour, what is its kinetic energy.
Jason is practicing his tennis stroke by hitting balls against a wall. The ball leaves his racquet at a height of 60 cm above the ground at an angle of 80' with respect to the vertical. Is ball on its way-up or down when the ball strikes the wall?
A refrigerator has a 1000 W compressor, but the compressor runs only 20% of the time, If electricity costs $0.10/kWh, what is the monthly (30 day) cost of running the refrigerator
Calculate the electric field within the membrane, if the thickness of the membrane were quadrupled.
A constant torque of 28- N•m is applied to a grindstone whose moment of inertia is 0.130 kg•m2. Using energy principles, and avoiding friction, find out the angular speed after the grindstone has made 15 revolutions.
The first-order bright fringe is a distance of 4.84 from the center of the central bright fringe. For what wavelength of light would the first-order dark fringe be observed at this similar point on the screen.
What is the magnitude
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