How many Kilocalories of heat does the operation of a 1200-W hair dryer produce each second?

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How many Kilocalories of heat does the operation of a 1200-W hair dryer produce each second?

2006-06-06 13:04:43 · 4 answers · asked by lady_bugs_2000 2 in Science & Mathematics ➔ Physics

4 answers

The answer is:

1 200 watt = 0.286 615 076 kilocalorie/second

2006-06-06 13:12:25 · answer #1 · answered by philk_ca 5 · 0⤊ 0⤋

1 cal = 4,185 Joule
P - power
Q - heat / energy
t - time
P = Q / t ->
Q = P x t = 1200 W x 1 sec. = 1200 Joule = 1200 / 4,185 cal = 286,738351.. cal = 0,28673... kcal

2006-06-07 00:49:23 · answer #2 · answered by zsozso 4 · 0⤊ 0⤋

Go to http://www.google.com/search?q=1200+Joules+in+calories and divide by 1000.

2006-06-06 20:19:58 · answer #3 · answered by ymail493 5 · 0⤊ 0⤋

0.286 kilocal/sec

2006-06-06 20:08:21 · answer #4 · answered by smokingun 4 · 0⤊ 0⤋