I need help for my physics question very confused ?
So the question goes like this. Your family decides to charge you 4.0 cents/ (kW- h) for watching programs
on television. If the television set is rated at 125 W, how long can you watch for
I know the answer is 10 hours but How do I get to that answer any help is greatly appreciated
- Anonymous8 months ago
5 cents / 4 cents/kwh = 1.25 kwh = 1250 wh
1250 wh / 125 w = 10 h
- thomas fLv 78 months ago
So 4¢ per kW-h= 1¢ per 250 W-h.
So 5¢=5 times 250=1,250 W-h total energy usage.
Since the TV consumes 125 W, 1,250 W-h/125 W=10 hr.(s)
(The W's cancel each other out.)