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Problem: An air conditioner operating between 88°F and 73°F is rated at 4100 Btu/h cooling capacity. Its coefficient of performance is 28% of that of a Carnot refrigerator operating between the same two temperatures.
Part A: What horsepower is required of the air conditioner motor?
Please explain each step and equations used.
Water discharges from a horizontal pipe at the rate of 5.00 x 10-3 m3/s. At point A in the pipe where the cross-sectional area is 2.00 x 10-3 m2, What is the velocity of the water at point A
Two cylinders each contain 0.20mol of a diatomic gas at 340K and a pressure of 3.0 atm. What is the final temperature of the gas in the cylinder A
what is the strength of the electric field 4.0 cm from a small glass bead that has been charged to 6.0 nc ? what is
Two small metallic spheres, each of mass m = 0.192 g, are suspended as pendulums by light strings of length L as shown in the figure below. The spheres are given the same electric charge of 7.6 nC, and they come to equilibrium when every string is at..
A lens that has a focal length of 8.45 cm is used as a magnifying glass. (Take the near point of a normal eye to be 25 cm from the eye.) What is the angular magnification
the back wall of a home aquarium is a mirror that is a distance of 46.0 cm away from the front wall. the walls of the
A skateboarder, with an initial speed of 2.0 m/s, rolls virtually friction free down a straight incline of length 18m in 3.3s. At what angle is the incline oriented above the horizontal
A flywheel having constant angular acceleration requires 4.6-{rm s} to rotate through 162 rad. Its angular velocity at the end of this time is 100 rad/s. Find out the angular velocity at the beginning of the 4.6s interval; the angular acceleration..
A 7.24 nC charge is located 1.93 m from a 4.10 nC point charge. Find the magnitude of the electrostatic force
An unknown substance has a mass of 0.125 kg and an initial temperature of 94.7. calculate the specific heat of the unknown substance
The masses of the earth and moon are 5.98*1024 and 7.35*1022 kg, respectively. Identical amounts ofcharge are placed on each body, such that the net force(gravitational plus electrical) on each is zero. What is the magnitude of the charge placed on..
A hole of radius r has been drilled in a flat, circular plate of radius R. Determine the moment of inertia for rotation about an axis through the centre of the plate
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