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The coefficient of performance of a refrigerator is 3.4. The compressor uses 20 J of energy per cycle.
A. How much heat energy is exhausted per cycle?
B. If the hot-reservoir temperature is 29 degree, what is the lowest possible temperature in ^\circC of the cold reservoir?
The truck slows down uniformly with an acceleration of 5.60 m/s2 for 4.20 s, making skid marks 62.40 m long that end at the tree. With what speed does truck then strike the tree.
A cart of mass m moves with a speed v on a frictionless air track and collides with an identical cart that is stationary. what is the final kinetic energy of the system
A force vector points at an angle of 64.9 ° above the +x axis. It has a y component of +276 Newton's (N). Find out (a) magnitude and (b) x component of the force vector.
The magnitude of the field produced by a point charge of +5.4 micro-coulombs has a magnitude of 5.9 x 106 N/C, How far is the point from the charge
A coin placed on a turntable rotating at 33.6 rev/min will stay there if its center is placed no further than 8.3 cm from the axis of rotation. compute coefficient of friction between the coin and turntable
Starting from rest, a 4.10-kg block slides 2.6 m down a rough 30.0° incline. The coefficient of kinetic friction between the block and the incline is ?k = 0.436, Determine the work done by normal force
A car with a mass of 980 kg is initially traveling east toward an intersection with a speed of vc = 20.8 m/s, Determine the initial speed of the truck and the final speed of the wreckage
A roller coaster descends 35 meters in its initial drop and then rises 23 meters before going over the first hill. what is the radius of curvature of the first hill
A pair of cylindrical shoes each having a radius of 1 m and height of 5 cm are designed to allow a person to stand on water without getting their feet wet. What is the largest mass the person can have
The index of refraction for violet light in silica flint glass is 1.66 and that for red light is 1.61. What is the angular dispersion of visible light
A Volleyball is spiked so that it has an initial velocity of 15 m/s directed downward at an angle of 55 degrees below the horizontal. Find the horizontal component of the ball’s velocity when the opposing player fields the ball?
A radio reciever can pick up signals with peak electric fields as weak as 425muV/m. What is the average intensity of such a signal
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