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?

A cup of coffee at temperature 100^(@)C is placed in a room whose temperature is 20^(@)C and it costs to 60^(@)C in 10 minutes find the temperature after a further interval of 10 minutes .

A cup of coffee at temperature 100^@C is placed in a room whose temperature is 15^@C and it cools to 60^@C in 5 minutes. Find its temperature after a further interval of 5 minutes

Covert the given temperature : -30^@C = _________K

A body cools from 60^@ C to 50^@ C in 10 min of room If the room temperature is 25^@ C and assuming Newton's cooling law holds good, the temperature of the body after 10 more minute.

A metal block of heat capacity 90J//.^(@)C placed in a room at 25^(@)C is heated electrically. The heater is switched off when the temperature reaches 35^(@)C . The temperature of the block rises at the rate of 2^(@)C//s just after the heater is switched on and falls at the rate of 0.2^(@)C//s just after the heater is switched off. Assume Newton's law of cooling to hold (a) Find the power of the heater. (b) Find the power radiated by the block just after the heater is switched off. (c ) Find the power radiated by the block when the temperature of the block is 30^(@)C . (d) Assuming that the power radiated at 30^(@)C respresents the average value in the heating process, find the time for which the heater was kept on.

A body at a temperature of 50^0F is placed outdoors where the temperature is 100^0F . If the rate of change of the temperature of a body is proportional to the temperature difference between the body and its surrounding medium. If after 5 min the temperature of the body is 60^0F , find (a) how long it will take the body to reach a temperature of 75 ^0 F and (b) the temperature of the body after 20 min.

Covert the given temperature : 20^@C = _________ ^@F

Covert the given temperature : -20^@C = _________K