A carnot's engine has an efficiency of 50% when its sinks temperature is 27 degree C what must be the change in its source temperature for increasing its efficiency of 60% ?

The pressure of a gas is halved at constant temperature.What will be the change in its volume?

Find the efficiency of a carnot's engine that works between the temperature 427 degree C and 27 degree C of the source and the sink respectively . If the 140 calories of heat are absorbed from the source by the engine in one cycle calculate the heat rejected into the sink .

If a copper wire is stretched to make 0.1% longer, what is the P.C. change in its resistance?

A body cools from 50°C to 40°C in 5 min .Its temperature comes down to 33.3°C in next 5 min .the temperature of surrounding is

Describe the various operation of a carnot's reversible engine and obtain and expression its efficiency .

The temperature of source and sink of a carnot engine are 400K and 300k respectively its efficiecy is

The co-efficient of line expansion brass is 2*10^-5°C^-1 , By how much the temperature of a brass rod be increased so as increase its length by 4%.

The co-efficient of volumn expansion of a liquid is 49*10-5 C^-1 ,By what percentage does its density change on raising the temperature by 50°C?

If the temperature of a gas is increased four times its original value,what will be the change in rms velocity of its molecules?

The resistance of a conductor is 5 Omega at 50°C and 6 Omega at 100°C. What is its temperature at 0°C?