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flabberghaster OP wrote (edited )

Reply to comment by hollyhoppet in Why do we have kWh when we already had joules by flabberghaster

Well I mean specifically that a watt is defined as one joule of energy per second, energy over time. Then we multiply that by time and we're left with a kWh being the same dimension as the Joule.

It's like if we measured distance by saying how many "velocity seconds" apart things were. (Which we do in space, we measure vast distances by light seconds but that's not my point)

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hollyhoppet wrote

ah, so the watt wasn't defined to be one joule per second the mid 20th century. before that it was close by coincidence but not exactly that.

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