A 1000-watt microwave oven takes 60 seconds to heat a bowl of soup. How many joules of energy does it use?

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Answer 1 · 2014-08-03T15:16:15

The microwave uses $6000 J$ $6000 J$ of energy.

Where $P$ $P$ = Power, $t$ $t$ = time, and $W$ $W$ = work ...

$P = 1000$ $P = 1000$ watts
$t = 60$ $t = 60$ seconds

The formula for Power is given by:

$P = \frac{W}{t}$ $P = W/t$

Therefore:

1000 Watts = $\frac{W}{60}$ $W/60$

So ...

$W = 1000 (60) = 6000 W$ $W=1000(60) =6000 W$ (or J=Joules)

From this, we can say that a microwave oven of 1000 W uses 6000 J of energy in 1 minute (60 seconds).