# Gia

### heat pumps and refrigerators ?

You want the freezer to convert 10.6 kg of water at 21.0°C to 10.6 kg of ice at −9.7°C in 2.00 h. The power rating of the freezer must stay below 100 W. From these requirements, determine the minimum COP of the freezer that will satisfy the conditions. (Consider that the specific heat of water is 4,186 J/(kg · °C), the specific heat of ice is 2,090 J/(kg · °C), the latent heat of fusion of water is 3.33 ✕ 105 J/kg, and the latent heat of vaporization of water is 2.26 ✕ 106 J/kg.

Physics2 months ago### Heat Engine?

Energy as heat is input into a steam turbine to convert 14 kg of liquid water at 25C to water vapor at 100C every hour. The efficiency of this heat engine is 22%.

How would you find the power output of the heat engine in Watts?

1 AnswerPhysics2 months ago### Calculate the pH of a 1.4 M solution of NaBr.?

Calculate the pH of a 1.4 M solution of NaBr.

2 AnswersChemistry8 months ago### Solve the given differential equation by undetermined coefficients. y'' − 2y' + 37y = ex cos(6x)?

Solve the given differential equation by undetermined coefficients.

y'' − 2y' + 37y = ex cos(6x)

2 AnswersMathematics8 months ago### A mass (m= 5.0 kg) hangs vertically connected by a light cord to a mass M = 6.0 kg, which slides on a smooth surface ramp up a 25 degree..?

A mass (m= 6.0 kg) hangs vertically connected by a light cord to a mass M = 7.0 kg, which slides on a smooth surface ramp up a 25 degree incline. The pulley (a solid disk, I=1/2 mR^2 ) rotates about a frictionless axle and has a radius R = 0.14 m and a mass of 4 kg . The cord does not slip on the pulley. What is the magnitude of the tension in the vertical part of the cord (connected to the smaller mass)

Physics8 months ago