From what I understand, kilo is used for a 1000 units of something. Like kilometer is 1000 meters, kilogram is 1000 gram and so on. But when it comes to the food we consume, when we say coconut water has 18 kilocalorie/100 gm, why does it not mean 18000 calorie in general sense?
In: Physics
Because Americans are idiots, and use anything but the metric system.
* 1 kcal (metric kilocalorie)
* 1000 cal (metric calorie)
* 1 Calorie (US Food Calorie)
* 4184 J (SI/Metric Joules)
All of the above values represent the same amount of energy.
* 1 cal is the amount needed to raise 1 g of water by 1 K/°C
* 1 kcal is the amount needed to raise 1 kg of water by 1 K or 1 °C
* 1 cal is the amount needed to raise 1 ml of water by 1 K or 1 °C
* 1 kcal is the amount needed to raise 1 l of water by 1 K or 1 °C
* 100 cal is the amount needed to raise 10 ml of water by 10 K or 10 °C
* 1 kcal is the amount needed to raise 100 ml of water by 10 K or 10 °C
* 10 kcal is the amount needed to raise 1 l of water by 10 K or 10 °C
You can answer the following question with this:
How long does it take to raise a pot with 5 l of water from 20 °C to 70 °C, with an electric stovetop of 1500W and an efficiency of 80%.
Hint: 1 W (Watt) = 1 J/s (Joules per second)
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