An incandescent lamp consumint `P=54W` is immersed into a transparent calorimeter containing `V=10^3cm^3` of water in 420 s the water is heated by `4^@C`. The percentage of the energy consumed by the lamp that passes out of the calorimeter in the form of radiant energy is

An electric heater whose power is 54 W is immersed in 650cm^3 water in a calorimeter. In 3 min the water is heated by 3.4^@C . What part of the energy of the heater passes out of the calorimeter in the form of radiant energy?

An electric heater whose power is 54 W is immersed in 650cm^3 water in a calorimeter. In 3 min the water is heated by 3.4^@C . What part of the energy of the heater passes out of the calorimeter in the form of radiant energy?

An electrically heated coil is immersed in a calorimeter containing 360 g of water at 10^@C . The coil consumes energy at the rate of 90 W. The water equivalent of calorimeter and coil is 40 g. The temperature of water after 10 min is

An electrically heated coil is immersed in a calorimeter containing 360 g of water at 10^@C . The coil consumes energy at the rate of 90 W. The water equivalent of calorimeter and coil is 40 g. The temperature of water after 10 min is

An electrically heated coil is immersed in a calorimeter containing 360 g of water at 10^@C . The coil consumes energy at the rate of 90 W. The water equivalent of calorimeter and coil is 40 g. The temperature of water after 10 min is

A thin metallic wire of resistance 100 Omega is immersed in a calorimeter containing 250 g of water at 10^@C and a current of 0.5 ampere is passed through it for half an hour. If the water equivalent of the calorimeter is 10 kg, find the final temperature of water.

A thin metallic wire of resistance 100Omega is immersed in a calorimeter containing 250g of water at 10^(@)C and a current of 0.5 ampere is passed through it for half an hour. If the water equivalent of the calorimeter is 10g, find the rise of temperature.

Water from a reservoir maintained at a constant temperature of 80^(@)C is added at a slow and steady rate of m = 3 gs^(-1) to a calorimeter initially containing 1000 g of water at 20^(@)C . The water in the calorimeter is stirred slowly to make the temperature uniform. Assume heat loss to the surrounding and work done in stirring is negligible and heat capacity of the calorimeter is negligible. Write the temperature of water in the calorimeter as a function of time.

An electrically heating coil was placed in a calorimeter containing 360g of water at 10^(@)C . The coil consumes energy at the rate of 70W . The water equivalent of calorimeter and coil is 40g . Find temperature of the water after 10min . Given specific heat of water = 1 cal//g.^(@)C, 1 cal = 4.2J .