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please explain : Joule, Calorie

Chemistry
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both of these are units of energy. joule is the SI unit of energy. calorie is the pre SI unit of energy.. 1 Calorie = 4.814 joules.
could you plz explain how Joule is defined
like, we defined Newton as the attraction with which earth pulls an apple of 100 grams

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could you just give some practical definition for Joule, so that i understand and make sense of it plz
look!! it can be defined in many ways. like it can be defined as:- the amount of work done when a force of 1 newton is applied on a body and it displaces 1metre.
can i say, if an apple of 100grams falls from 1 meter height, then the kinetic energy of apple will be 1 Joule ?
defining something is way too easy a thing. what you have to do is just write the expression. in this case write any expression having work or energy. as WORK = FORCE * DISPLACEMENT. so, just put FORCE = 1 NEWTON DISPLACEMENT= 1metre. on putting these in the expression, what we get is your "1 Joule!!". i hope this helps you!!
ahh yes i see now , so if displancement = 2, force =1, then W = 2 Joule !!
thats correct ?
also, that 2Joule energy just manifests of Kinetic energy, right ?
ataboy! gud correct!!!!!!!!
thnk u
velcum!!!!!!!!!

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