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50J of work are done per cycle on a refrigerator with a coefficient of performance of 3.0.
A) How much heat is extracted from the cold reservoir per cycle? (in J) Express your answer using two significant figures.
B) How much heat is exhausted to the hot reservoir per cycle? (in J) Express your answer using two significant figures.
A wheel starts from rest and rotates about its axis with constant angular acceleration. What is the angular acceleration of the wheel
An underwater scuba diver sees the Sun at an apparent angle of 26? from the vertical. What is the Sun's angle of inclination
A viscous liquid is flowing steadily through a pipe of diameter D. Suppose you replace it by 7 parallel pipes, what is the total rate of flow in the 7 pipes compared to the original flow rate
A wooden raft has a mass of 90 kg. When empty it floats in water (density 1000 kg/m3) with 67% of its volume submerged. What mass of sand can be put on the raft without it sinking
Electrons are accelerated through a voltage difference of 145 kV inside a high voltage accelerator tube. What is the final kinetic energy of the electrons
An electric dipole is formed from ±1.0nCcharges spaced 2.00mm apart, What is the electric field strength at the points (x, y) = (14.0 cm , 0 cm),(x, y) = (0 cm, 14.0 cm)
an electron is fired with speed 2400 ms into a region of uniform electric field with magnitude 8 nc. assuming the
An engineer is developing an electric water heater to provide a continuous ("on demand") supply of hot water. What is the power at which the heater operates
A jackhammer causes a sound intensity of 95 bB at a point where a person is standing. What is the sound intensity level at the position of the listener
A particular guitar string is supposed to vibrate at 203 Hz, other than it is measured to actually vibrate at 208 Hz. By what percentage must the tension in the string be changed to get the frequency to the correct value.
Four long wires are kept on each corner of a square of side 58cm and the current of 22A flows throgh them in the direction, Find the magnitude of the net force on the wire
The bottom of a flat bottom aluminum boat has an area = 4 msquared and the mass of the boat is 80 kg. how much lower will the boat ride in the water
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