Or we could burn the biscuit and turn it into heat energy. We could eat the biscuit to provide us with energy. (That's with "172 Calories" meaning 172 kilocalories, which is the unit that is almost always meant when people talk about the "calories" in food.)Įnergy can change form. 172 Calories is equivalent to around 0.2 kWh.
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When people talk about a particular biscuit containing 172 Calories, they're talking about the amount of energy contained within that biscuit. Similarly, you can express a measure of energy in joules, or Calories, or kWh, or BTU etc. The distance between New York and London is fixed, but you can express that distance as 3,459 miles, or 5,567 km, or 18,265,315 feet etc. It's a bit like how you can measure distance in units of feet, metres, miles, km and so on. And these aren't the only units of energy – there's the BTU, the watt hour (Wh), the therm, and plenty of obscure units that you're unlikely to have heard of. The kilowatt hour (kWh) is a unit of energy. But fortunately we're not writing this for physicists.) (A physicist might throw their arms up in disgust at how we've over-simplified one of the fundamentals of the universe. Though it only seems simple after you understand it.Įnergy is a measure of how much fuel is contained within something, or used by something over a specific period of time. Well, the difference is really very simple. What is the difference between a kW and a kWh?
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#Does apower converter run all the time software
Or, if you find it useful, you could buy or recommend our Energy Lens software – we really appreciate the customers that keep us in business.)Īnyway, that's more than enough preamble.
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(If at any point you'd like to thank us for our help in reducing headaches and embarrassment, please point your colleagues and website visitors towards this article so that it can help them too. Quite likely it will save you some embarrassment at some point too, as you'll be much less likely to make embarrassing calculation errors. If you're working with energy on a regular basis, and you don't fully understand the difference between a kW and a kWh, we promise you that taking 20 minutes or so to fully understand the concepts explained in this article will save you many headaches in the future. Energy calculations, and energy saving, become much easier when you understand the difference between a kW and a kWh.