The metric unit of Joule was founded in memory of the famous British physicist James Prescott Joule.

convert

Joule-Calories:

1 kcal = 4. 184 kj.

1 kj) =0.239 kcal

1 card =4. 184 joules

1 joule =0.239 calories.

Joule-Watt:

1 joule = 1 watt× second

1 degree (1 kwh) = 3.6× 10 6 joules (joules)

Joule-Newton:

1 joule (J)= 1 Newton× meter (n m)

Extended data

The discovery of Joule's law

1840 65438+in February, he read a paper on heat generation by current in the Royal Society of England, and put forward the law of heat generation by current passing through a conductor; Not long after, Lengci discovered the same law independently, so he called it Joule-Lenz Law.

Expressed by the following formula: q = I 2 * rt (j)

I= current through the conductor, in a;

R= effective resistance of conductor, in ω;

T= power-on time, in seconds.

Baidu Encyclopedia-Joule

Baidu Encyclopedia-James Prescott Joule