# Physics - Assist pls!

Dear All please do help me out - thanks.

How much heat and light energy is produced by a 100W electric lamp in 5 minutes?
Solutn = I tried this using
Energy = power x time
100 x 5min
= 100 x 300 sec
= 30,000J - Pls do I got the answer?

You will see it easier if you include the units.
1 W=1 J s^-1

So energy produced is

100 W x 300 s
=100 J s^-1 x 300 s
=30000 J

You should note the spacing of the units, and it is 's' not 'secs'. But hey I'm picky.

To DrRuss--I hope you come around often. We need someone with a little organic background. Mine is little, but TOO little (too late).

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