Question

If the emissive power of a spherical body of surface area 0.02 m2 is 2.1 kw/m2 then the amount of heat radiated by the surface in 10 seconds is -

1) 0.42 kJ      2) 0.84 kJ      3) 4.2 kJ      4) 8.4 kJ

​

Answer 1

Answer: emissive power= Q/A t

heat radiated= emissive power*area * time

                =2.1*0.02*10=0.42 KJ

Explanation:IF IT HELPS MARK AS BRAINLIEST