- #1

Krushnaraj Pandya

Gold Member

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## Homework Statement

What would be the increment in heat energy radiated when the temperature of a hot body is raised by 5%?

## Homework Equations

P=σεAT^4

## The Attempt at a Solution

dP/P=4dT/T dT=5 when T is 100 initially. Lets assume P was also 100 initially for convenience, therefore dP should be 20, but the answer given is 21.55%, where am I wrong and what's the correct way to approach this?