2007-04-12 04:16:34 · 5 answers · asked by bombshellbeuaty 2 in Science & Mathematics ➔ Physics
Eleventeen
2007-04-12 04:20:44 · answer #1 · answered by Jim B 4 · 0⤊ 0⤋
1 unit of electricity generally refer to 1 KWh (1000 Watts.hrs).
So if the power of bulb is x watts, total time (t) it can run:
t = (1000 / x) hr
So, for 500 Watts, t = 1000 / 500 = 2 hrs
for 100 Watts, t= 1000/100 = 10 hrs
2007-04-12 11:34:12 · answer #2 · answered by sss 3 · 0⤊ 0⤋
What on earth do you mean by a unit of electricity?
What you SHOULD mean is a kilowatt-hour, which is how we measure electrical energy.
With that much power, the big bulb lasts 2 hours and the little one lasts 10 hours.
2007-04-12 11:22:52 · answer #3 · answered by Anonymous · 0⤊ 0⤋
define the unit
a unit 1000 megawatts would blow both away
a watt wouldn't make any light
now a sensible answer would be the 100w would burn 5 times as long as the 500w, indicating a linear relationship
2007-04-12 11:24:09 · answer #4 · answered by iam2inthis 4 · 0⤊ 0⤋
I would say that the 100 watt bulb will run 5 times longer.
2007-04-12 11:19:20 · answer #5 · answered by Gene 7 · 0⤊ 0⤋