A watthour is 3.600 Joules. It is an SI unit (Système international (d'unités). The mile is an Imperial measure. The two systems share the second in common.
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Convert 60 Miles per Hour to Kilometers per Hour
https://www.calculateme.com/speed/mi...rsperhour/60
What is 60 miles per hour in kilometers per hour? 60 mph to km/h conversion. From. To. swap units ↺ Amount. 60 Miles per Hour = 96.56064 Kilometers per Hour (exact result) Display result as. A mile per hour is a unit of speed commonly used in the United States. It is equal to exactly 1.609344 kilometers per hour. ...

60 mph is not quite 100 km/h; what we might call a 'first approximation' for purposes of comparison.
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."Once men turned their thinking over to machines thinking this would set them free. This only allowed other men with machines to enslave them." Frank Herbert
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