Question

the emasive power of area 0.2 m² is0.5kcal 5–¹ m–² what is the amount of heat radieted by the sperical suface in 20s​

Answer 1

Answer: E=etA

Explanation:

emissive power is equal to power per unit area, but power is equal to energy per unit time, hence emissive power is equal to the energy per unit time per unit area (definition of emissive power) hence by making subject energy (let this energy be energy lost by the body in form of radiation) E=etA, hence solve for E