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An ice-making machine operates in a Carnot cycle. It takes heat from water at 0.0°C and rejects heat to a room at 22.5°C. Suppose that 69.0 kg of water at 0.0°C are converted to ice at 0.0°C.
(a) How much heat is discharged into the room?
(b) How much energy must be supplied to the device?
The output voltage of an AC generator is given by ?v = (190 V) sin (70?t). The generator is connected across a 12.0-? resistor. Find the power delivered to the resistor
A car traveling at a constant speed of 21.5 m/s passes a trooper hidden behind a billboard. One second after the speeding car passes the billboard, the trooper sets off in chase with a constant acceleration of 3.10 m/s2. How long does it take the ..
A ball is thrown toward a cliff of height h with a speed of 29m/s and an angle of 60? ^\circ above horizontal. It lands on the edge of the cliff 3.5s later. How high is the cliff
A magnetic computer disk 8 cm in diameter is initially at rest. A small dot is painted on the edge of the disk. A small dot is painted on the edge of the disk. The disk accelerates at 600 rad/s^2 for 1/2 s , then coasts at a steady angular velocit..
A major motor company displays a die-cast model of its first automobile, made from 6.60 kg of iron. What mass of gold is needed to make the new model
In the system shown in the figure below, a horizontal force F with arrowx acts on an object of mass m2 = 8.60 kg. The horizontal surface is frictionless. Consider the acceleration of the sliding object as a function of Fx.
Assume a water strider has a roughly circular foot of radius 0.01 mm. What is the maximum possible upward force on the foot due to surface tension of the water
A tennis ball gun launches tennis balls at 17.6 m/s . It's pointed straight up and launches one ball; 2.0 s later, it launches a second ball. I already found - At what time (after the first launch) are the two balls at the same height? = 2.8s What..
The yellow light from a helium discharge tube has a wavelength of 587.5 nm. Calculate the number of lines per centimeter on the grating
The plates of a parallel-plate capacitor have a separation of 4.70mm , and each has an area of 13.4cm^2 . what is the potential difference between the plates
A heart defibrillator passes 10.5 A through a patient's torso for 5.00 ms in an attempt to restore normal beating, How much charge passed
An average temperature of the rest of the universe
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