A hot water system is 65% efficient. If it is supplied with 3000 joules of electrical energy, how much hot water does it produce?
Science - Energy?
- Posted:
- 3+ months ago by random1881
- Topics:
- water, energy, system, science, electrical, produce, google, hot
Details:
Answers (2)
This is crazy. A heater is 100% efficient. If you get some other number, you have a leak.
Energy is not a physical unit. It is a philosophical concept and an accounting technique used to analyze mechanical and chemical exchanges. In nuclear physics it is defined as a wavelength of light, in biology it is a synonym for metabolism, and in public utilities they say energy when they mean connectivity. Anybody who uses the word in any other context either does not know what he is talking about, or is peddling something you don't need.
What you have there is a power conversion. You have to know the temperature rise to find an answer.
Nothing is 100% efficient. Everything has leaks.
But, 65% seems too low for a hot water system. For physical system it may be too high.
Even if the quantity is given, it is a fairly complicated question. Energy needed for temperature change of water/materials varies with the change of temperature.