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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?
Felipe over the summer goes to six flags, he gets on a ride that starts at a height of 29m traveling at a speed of 5 m/s, what is the normal force from the seat when he is at the top of the loop
A 21 kg chimpanzee hangs from the end of a horizontal, broken branch of length L_0 = 1.6 m, What is the shear modulus for this branch
For the polarisers, assume the incident light is linearly polarized, the transmitted intensity (through both polarisers) is 0.15×I0, and the axis of the second polarizer makes an angle θ=41° with the axis of the first polarizer. What is the angle (in..
Calculate the average density of a red giant star in grams per cubic centimeter. Take the star's mass to be 2*10^33 gm and its radius to be 3*10^12 cm
Find the capacitance of a parallel plate capacitor that has two square plates both having a side length of 6 cm, where these plates are seperated by 15 mm
A lens is coated with material of indexof refraction 1.38. What thickness of coating should be used to give maximum transmission
In recent years, a number of nearby stars have been found to possess planets. Find the mass of the star
The sound intensity 59 m from a wailing tornado siren is 0.11 W/m2. (a) What is the intensity at 1190 m (b) The weakest intensity likely to be heard over background noise is 1 µW/m2.
q1. black holes are suspected while a visible star is being noticeably pulled by an invisible partner that is more
When a rifle is fired, the person firing the rifle absorbs the recoil. Consider an Olympic biathlete firing a competition rifle. What is the magnitude of the force absorbed by the athlete
A 3.0 kg block rests on a 30° slope and is attached by a string of negligible mass to a solid drum of mass 0.80 kg, What is the coefficient of friction between block and slope
a thin, uniform bar of length D = 1.28 m and mass M = 0.67 kg pivoted at the top. find the speed of the particle before impact
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