The efficiency of an ideal engine is `1/8`. By lowering the temperature of the sink by 100 K, it increases to `1/4`. Find initial and final temperature of sink.

The temperature of water falling from a dam gets increased by 0.1^@C .Find the height of dam.

In a Carnot engine, the temperature of sink is increased. What will happen to it efficiency?

At room temperature (27.0 ^@C) the resistance of a heating element is 100Omega . What is the temperature of the element if the resistance is found to be 117Omega . given that the temperature coefficient of the material of the resistor is 1.70 xx 10^-4 ^@C^-1 .

For 100% effiiency of Carnot engine, temperature of the sink should be

By how muych the velocity increases for 1^@C1 rise of temperature?

At room temperature (27.0^@ C) the resistance of a heating element is 100 Omega . What is the temperature of the element if the resistance is found to be 117 Omega , given that the temperature coefficient of the materials of the resistors is 1.70 xx 10^-4 ^@C^-1 ?