Coefficient Of Performance

Relation Between Coefficient Of Performence And Efficiency Of Refrigerator

A refrigerator is to maintain eatables kept inside at 7^(@)C . The coefficient opf performance of refrigerator if room temperature is 387^(@)C is

A refrigerator whose coefficient of performance eta' is 4, extracts heat from the cooling compartment at the rate of 400 J per cycle. (a) How much work per cycle is required to operate the refrigerator cycle? (b) How much heat per cycle is discharged to the room which acts as the high temperature reservoir?

A refrigerator, whose coefficient performance beta is 5, extracts heat from the collingcompartment at the rate of 250 J per cycle. (a) How much work per cycle is required to operate the refrigerator? (b) How much heat per cycle is discharges the room which acts as the high temperature revervoir?

A uniform rod is placed on two spinning wheels as shown in figure. The axes of the wheels are separated by a distance l=20 cm , the coefficient of friction between that in this case the rod performs harmonic oscillations. Find the period of these oscillations.

A metal rod of length l, cross-sectional area A, Youngs modulus Y and coefficient of linear expansion alpha is heated to t^(@)C . The work that can be performed by the rod when heated is