...radiative heat transfer from the shelf above to the top of the vial. Radiative heat flow, dQr/dt, depends on the difference between the fourth powers of the absolute temperatures of the two surfaces as (17) dt where a is the Stefan-Boltzmann constant and e is the effective emissivity...

...under such conditions, known as Stefan's law, is that the amount of heat transferred is proportional to the difference between the fourth powers of the absolute temperatures of the hot body and the absorbing body, respectively. Referring back to the example : In one case the coal is...

...that is transmitted from the hot parts of the furnace to the boiler plate is closely proportional to the difference between the fourth powers of the absolute temperatures of the hot parts of the furnace and the boiler plate. CONVECTION Convection of heat always implies Ihe motion...

...TEMPERA TUM - F»H«MM£ 1 1 >0«U 40CO 3540 radiated per square foot of radiating surface is equal to the difference between the fourth powers of the absolute temperatures of the radiating body and the receiving body, times a constant. The figures at the left show the heat units...

...blankets the surface and raises its temperature. The radiation from the surface is taken as varying with the difference between the fourth powers of the absolute temperatures of the surface and the air, multiplied by a constant to reduce the results to kilowatts of heat flow per square...

...from a hot flatiron or an RTG—states that the rate at which heat will be radiated is proportional to the difference between the fourth powers of the absolute temperatures of the radiating surface and the object absorbing the radiation. In the RTG case, the hot temperature is that...

...on it and does not reflect or transmit any. For such bodies the radiated energy is proportional to the difference between the fourth powers of the absolute temperatures of the emitting and the receiving body. But for most actual bodies this must be multiplied by a very appreciable...