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A freezer has a coefficient of performance of 5. It converts 1.5 kg of water at room temperature into ice at 25 μF within 20 minutes.
(a) How much electrical energy is consumed in the process and at what power does the refrigerator operate?
(b) How much heat is released into the environment of the freezer?
Suppose you pour water into a container until it reaches a depth of 18. What is the pressure at the bottom of the container
A wave pulse travels along a string at speed of 200 cm/s what will speed be if: string's tension is doubled? Strings mass is quadrupled (length unchanged) stings length is quadrupled (mass unchanged) strings mass and length are both quadrupled?
The first atomic bomb released energy equivalent to20 kilotons of TNT. If 1 ton of TNT releases 4x109 J, how much uranium was consumed through fission in the bomb
An artillery shell is fired with the initial velocity of 300 m/s at 54.7° above the horizontal. To clear an avalanche, it explodes on the mountainside 55.0 s after firing. What is the x and y components of the shell where it explodes, relative to its..
Frames k and k' are inertial frames. Frame k' is moving at a velocity of magnitude v realtive to frame k in the direction of the x-axis. there are rigid rods in each frame oriented along the direction of the relative velocity. someone in frame k meas..
1 what is the spring stiffness of the entire wire considered as a single macroscopic large scale very stiff spring?2
Water at the top of Niagara Falls has a temperature of 20.0°C. calculate the increase in temperature of the water at the bottom of the falls
A 0.20 m 0.70 m 0.40 m block is suspended from a wire and is completely under water. What buoyant force acts on the block
You hook a pipe with an hourglass shape to a water hose. The diameter of the large ends is 6 centimeter, and the narrow neck has a diameter of 2 centimeter. Determine the flow speed of the water
A line of negative charge lies along the x-axis from -3.40 cm to +5.30 cm. Calculate the net electric flux through the Gaussian surface
Two disks are rotating about the same axis. Disk A has a moment of inertia of 3.6 kg· m2 and an angular velocity of +7.6 rad/s. Disk B is rotating with an angular velocity of -10.8 rad/s.
A golfer tees off on level ground, giving the ball an initial speed of 38.5 m/s and an initial direction of 36.0° above the horizontal. (a) How far from the golfer does the ball land? (Neglect air resistance.)
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