Compare the rate of loss of heat from a metal sphere at `827^@C` with the rate of loss of heat from the same sphere at `427^@C`, if the temperature of the surrounding is `27^@C`.

Compare the rate of emission of heat by a black body at 327^@C with the rate of emission of heat of same body at 27^@C .

Compare rates of loss of heat by the body at temperature 527^@C and 127^@C . Temperatue of surrounding is 27^@C .

Compare the ratio of radiation of metal sphere at 627^@C and 327^@C .

Rate of loss of heat of two spheres at same temperature having radii in ratio 1 : 2 is

A metal sphere cools at the rate of 1.6^@ C /min when its temperature is 70^@ C . At what rate will it cool when its temperature is 40^@ C. The temperature of surroundings is 30^@ C.

A metal sphere cools at the rate of 0.05^@ C/s when its temperature is 70^@ C and at the rate of 0.025^@ C /s when its temperature is 50^@ C . Determine the temperature of the surroundings and find the rate of cooling when the temperature of the metal sphere is 40^@C .

A metal sphere cools at the rate of 1.6^@C//min when itstemperature is 60^@C . At what rate will it cool when its temperature is 50^@C ? The temperature of surroundings is 30^@C .

A body cools at the rate of 4^@C per minute when its temperature is 70^@C . What will be its rate of cooling when its temperature is 50^@C ? (Assume temperature of surrounding to be 30^@C )

Hot water cools from 60^@C to 50^@C in the first 10 minute and to 42^@C in the next 10 minute The temperature of the surrounding is

Liquid is filled in a vessel which is kept in a room with temperature 20^@C . When the temperature of the liquid is 80^@C , then it loses heat at the rate of 60 (cal)/s . What will be the rate of loss of heat when the temperature of the liquid is 40^@C ?