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Q: How many hours will it take to heat a 450 gallon hot tub from 72.0 F to 105 F using a 1.30 kW power supply?
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Is the metro rail train using ac or dc power supply?

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Is there any difference in the consumption of electricity by using two sizes of power supply for example a 350watt power supply and a 480watt power supply with all else being the same on the comp?

The computer will only consume what power it needs. No diffference. if you have a 350watt power supply, and it is using more then 70% power consuption, the life of that power supply will be short, so always aim big when picking out a power supply, ie: 50-100 watts more than what you would actually need.


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