Quote:
Originally Posted by whswhs
No. Just no. That's completely contrary to the physics.
A power line does not supply kWs; it supplies kW. kWs is not "kW a second," it's "kW sustained over a time of a second" or "kw times seconds." If it were "kW a second" the notation would be "kW/s." One is multiplying; the other is dividing.
And talking about "kW a second" is nonsense in this context. The kW is not a unit of energy; it's a unit of power. The unit of energy is the kJ (or kWs). A power line that supplies 360 kW is supplying 360 kJ a second; the "a second" is already there, built into the "kW." (That is, 360 kJ/s = 360 kWs/s = 360 kW.)
Bill Stoddard
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I thought we had covered the bit about kW/s being the change in wattage before, or am I wrong?
And while my terminology might be off, the point stands that a kWs isn't something delivered by a battery or other stored power source