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A "Carnot" refrigerator (reverse of a Carnot engine) absorbs heat from the freezer compartment at a temperature of -17°C and exhausts it into the room at 24°C.
(a) How much work must be done by the refrigerator to change 0.20 kg of water at 24°C into ice at -17°C
(b) If the compressor output is 200 W, what minimum time is needed to take 0.20 kg of 24°C water and freeze it at 0°C?
carnival ride has a large horizontal steel disc of radius 5m from which cars are suspended by a 6m long chain. the disx is rotated about its axis so that the cars swing out and revolve in a circular path. at operation speed the angle of the chains ..
An object with a mass of 27.0 g displaces 845.0 ml of water when it is completely immersed. What is the buoyant force on the mass
If each rock strikes the fixture travelling at 10.0 {rm m}/{rm s} horizontally and rebounds at 2.00 {rm m}/{rm s} backwards, how high above the lowest point does collision make your light fixture swing?
A vertical cylinder 6 ft tall and 1 ft in diameter might be used to approximate a man for heat-transfer purposes, Calculate the heat lost from the cylinder
Calculate the scale height for water vapor in the Earth's atmosphere, Use this information to state whether telescopes atop mount kea would be better for infrared astronomy than one's at sea level
Two hockey players strike a puck of mass 0.164 kg with their sticks simultaneously, exerting forces of 1.24 103 N, Find the instantaneous acceleration of the puck
A pot of hot water is boiling on your stove. The pot is in the shape of a round cylinder made of aluminum which is 10 cm in radius. The aluminum is 3 mm thick.
An automobile tire is rated to last for 40,000 miles. To an order of magnitude, through how many revolutions will it turn?
What is the current through the 6 ohm resistor?
The temperature of 1.5 kg of ethanol is 37c. What would the final temperature be if 80 000J of energy as heat is added to the ethanol.
The men's world record for the shot put, 23.12m, was set by Randy Barnes of the United States on May 20, 1990. If the shot was launched from 6 f above the ground at an initial angle of 42 degrees, what was its initial speed.
Light of wavelength 650 nm falls on a 0.48 mm wide slit and forms a diffraction pattern on a screen 1.8 m away.
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