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Why do you use kilojoules?

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Anonymous

15y ago
Updated: 8/18/2019

We use kJ, MJ, or GJ, because the Joule is a fairly small unit. For example, a 40-Watt light bulb, giving light during one hour, would use 40 x 3600 = 144,000 Joules, or 144 kJ, or 0.144 MJ. This is not a huge amount of energy!

We use kJ, MJ, or GJ, because the Joule is a fairly small unit. For example, a 40-Watt light bulb, giving light during one hour, would use 40 x 3600 = 144,000 Joules, or 144 kJ, or 0.144 MJ. This is not a huge amount of energy!

We use kJ, MJ, or GJ, because the Joule is a fairly small unit. For example, a 40-Watt light bulb, giving light during one hour, would use 40 x 3600 = 144,000 Joules, or 144 kJ, or 0.144 MJ. This is not a huge amount of energy!

We use kJ, MJ, or GJ, because the Joule is a fairly small unit. For example, a 40-Watt light bulb, giving light during one hour, would use 40 x 3600 = 144,000 Joules, or 144 kJ, or 0.144 MJ. This is not a huge amount of energy!

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Wiki User

15y ago

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The abbreviation for kilojoules is kJ.


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Which foods have kilojoules?

All foods 'have' kilojoules. A kilojoule is a measure of the amount of energy they can release when we 'burn' them. (You may be more familiar with calories, which are a different sized unit for the same thing). More exactly, all foods release energy when we use them in respiration, and this energy can be measured in kilojoules.


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I think bread has kilojoules in it, but i'm not sure.


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