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A mini-fridge needs to maintain a temperature of 277 K. The air outside the mini-fridge has a temperature of 292 K. Every fifteen minutes, 3.5 x 105 J of energy is transferred out of the mini-fridge and 4.37 x 105 J of energy is transferred into the surrounding air.
1) What is the power output (that is, the work done per second) of the compressor in the mini-fridge?
2) What is the coefficient of performance of this mini-fridge?
3) If this mini-fridge were instead cooled by a Carnot engine used as a refrigerator, what would its coefficient of performance be?
4) If the mini-fridge were cooled by a Carnot engine, how much energy would be transferred out of the mini-fridge every fifteen minutes if the power output of the compressor was the same as above?
Two capacitors, C1 = 2.0mF and C2 = 7.0mF , are in series, Find the charge stored on the second capacitor
A 0.100g plastic bead is charged by the addition of 1 x10^10 excess electrons (i.e. so the bead becomes negatively charged). What electric field (magnitude and direction) will cause the bead to hang suspended in the air?
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What voltage must be applied to the 5.00 µF capacitor of a heart defibrillator to store 600 J in it, Find the amount of stored charge
A Coast Guard cutter detects an unidentified ship at a distance of 20.2 km in the direction 16.7° east of north. The ship is traveling at 24 km/h on a course at 40.1° east of north. The Coast Guard wishes to send a speedboat to intercept the vesse..
Find out the magnitude of the charge on the moving particle. The baby soon learns to bounce with utmost amplitude and minimum effort by bending her knees at what frequency.
A convex lens with f1= 20.3cm is mounted 39.5cm to the left of a concave lens. When an object is placed 29.4cm to the left of the convex lens, What is the focal length f2 of the concave lens
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A proton takes 99.0 usto complete one orbit around a 14.5 m diameter cyclotron. What's the cyclotron's magnetic field
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A proton is placed in an electric field of intensity 700 N/C. What is magnitude and direction (towards or away from the field) of the acceleration of this proton because of this field? The charge on a proton is +1.6 x 10-19 C and the mass of a prot..
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