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An air conditioner is used to keep the interior of a house at a temperature of 20 C while the outside temperature is 35 C. If heat leaks into the house at the rate of 12 kW, and the air conditioner has the efficiency of a Carnot engine, what is the mechanical power required to keep the house cool?
question1a potters wheel having a radius 0.53 m and a moment of inertia 14 kgbullm2 is rotating freely at 53 revmin.
A steel aircraft carrier is 364m long when moving through the icy North Atlantic at a temperature of 2.4°C. By how much does the carrier lengthen as it is traveling in the warm Mediterranean Sea at a temperature of 21° C.
Shoveling snow can be extremely taxing since the arms have such a low efficiency in this activity. What is her useful power output
A freezer has a coefficient of performance of 6.30. It is advertised as using 446 kWh/yr. how much energy does it use in a single day
Two small plastic spheres are given positive electrical charges. When they are a distance of 14.8cm apart, What is the charge on the second sphere
Sharon has a mass of 60 kg and is standing on a giant skateboard that is initially at rest and has a mass of 30kg. what is the speed of the skateboard
Maria throws Jackson a life preserver attached to a rope. Jackson's mass is 235 kg. What is the Net Force on Jackson
The stars ? Aurigae A and ? Aurigae B constitute a double-lined spectroscopic binary with an orbital period of 3.96 days. what are the masses of the two stars
A laptop computer sits on the horizontal surface of the seat of a car moving at 8.0 m/s. The driver starts slowing down to stop. Find the minimum stopping distance
At an outdoor market, a bunch of bananas is set into oscillatory motion with an amplitude of 26.93 cm on a spring with a spring constant of 10.7167 N/m. What is the weight of the bananas
The definition of power differs from the definition of work in that the former always involves...
A ball is thrown from the ground with a speed of 30m/s at an angle of 55 degree above the horizontal. If we neglect air resistance, How far from where it is thrown will the ball land
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