Question

State the energy changes in the following while in use:
$\left(i\right)$ Burning of candle.
$\left(ii\right)$ A steam engine.

Answer 1

Energy changes:
$\left(i\right)$ Burning of a candle: Chemical energy to light energy.
$\left(ii\right)$ Steam engine: Chemical energy of coal first changes to heat energy of steam and then heat energy changes into mechanical energy.