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A certain refrigerator has a K of 5. When it is running its power input is 500 Watt. A sample of water of mass 500 gram and temperature of 20oC is placed in the freezer compartment. Find how long does it take to freeze the water to ice at 0oC? Suppose the temperature is constant in all the other parts of the refrigerator and no leakage to the exterior.
Suppose the superhero had flown 145 m at a 125° angle with respect to the positive x-axis
15 mol of an ideal gas expands isothermally at 373 K to 12.5 its inital volume. Find the heat flow into the system
a if the block reaches the bottom of the slope at 12.0 ms what is the average frictional force between the block and
part a calculate the magnitude of the force required to give a 0.145-kg baseball an acceleration a1.00ms2 in the
A "torsional pendulum" comprises a uniform vertical quartz fiber attached to the top of a uniform solid sphere of mass m = 2 kg and radius r = 0.1m. what is the angular amplitude of the subsequent motion
A sensitive gravimeter at a mountain observatory finds that the free-fall acceleration is 7.50×10?3 less than that at sea level. What is the observatory's altitude
To test the quality of a tennis ball, you drop it onto the floor from a height of 4.26 m. what is its average acceleration during that contact
Three 3 uC charges are at the three corners of a square of side 0.50 m. The last corner is occupied by a -3.0 uC charge. Find the electric field at the center of the square
the archerfish hunts by dislodging an unsuspecting insect from its resting place with a stream of water expelled from
When 1.0 kg of coal is burned, about 3.0 x 107 J of energy is released. how many kilograms of coal must be burned to produce the same energy as 0.79 kg of 92U235
a high-voltage copper transmission line with a diameter of 1.40 cm and a length of 300 km carries a steady current of
At the end of her routine, an ice skater spins through 8.00 revolutions with her arms always fully outstretched at right angles to her body.
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