The room heater can provide only `16^(@)C` in the room when the temperature outside is `-20^(@)C`. It is not warm and comfortable, that is why th electric stove with power of `1 kW` is also plugged in. Together these two devices maintain the room temperature of `22^(@)C`. Determine the thermal power of the heater.

Does a body at 20^(@)C radiate in a room, where the room temperature is 30^(@)C ? If yes, why does its temperature not fall further?

Does a body at 20^(@)C radiate in a room, where the room temperature is 30^(@)C ? If yes, why does its temperature not fall further?

Does a body at 20^(@)C radiate in a room, where the room temperature is 30^(@)C ? If yes, why does its temperature not fall further?

Does a body at 20^(@)C radiate in a room, where the room temperature is 35^(@)C ? If yes, why does its temperature fall further?

Does a body at 20^(@)C radiate in a room, where the room temperature is 35^(@)C ? If yes, why does not its temperature fall further?

A metal block is placed in a room which is at 10^(@)C for long time. Now it is heated by an electric heater of power 500W till its temperature becomes 50^(@)C Its initial rate of rise of temperature is 2.5^(@)C//sec The heater is switched off and now a heater of 100W is required to maintain the temperature of the block at 50^(@)C The heat radiated per second when the block was 30^(@)C is given as alpha watt. Find the value of ((alpha)/(10)) (Assume Newton's law of cooling to be valid .

The temperature of a room heated by heater is 20^@C when outside temperature is -20^@C and it is 10^@C when the outside temperature is -40^@C . The temperature of the heater is

The temperature of a room heated by heater is 20^@C when outside temperature is -20^@C and it is 10^@C when the outside temperature is -40^@C . The temperature of the heater is