Question

A thin square plate, 10 cm on a side, is heated to 8000⁰C. if the emissivity is 0.6, what is the total rate of radiation of energy from the plate?[stefan's constant = 5.67 x 10⁻⁸ w/m²k4]

a. 991.0 w
b. 901.9 w
c. 199.0 w
d. 109.9 w

Answer 1

To calculate the total rate of radiation of energy from the plate, we can use the Stefan-Boltzmann law which states that the rate of radiation is proportional to the emissivity, surface area, and the fourth power of the temperature.

Step-by-step explanation:

To calculate the total rate of radiation of energy from the plate, we can use the Stefan-Boltzmann law which states that the rate of radiation is proportional to the emissivity, surface area, and the fourth power of the temperature. The formula is:

Rate of radiation = emissivity * Stefan's constant * surface area * (temperature)^4

Plugging in the values, we have:

Rate of radiation = 0.6 * (5.67 x 10^-8 W/m²K^4) * (0.1 m)^2 * (8000 + 273)^4

Simplifying the equation will give us the answer: