energy density and power density
Energy density refers to the amount of energy stored in a given volume or mass of a substance or material. It is a measure of how much energy can be stored in a given amount of space or mass. Power density, on the other hand, refers to the rate at which power is generated or delivered per unit volume or mass. It measures the amount of power that can be produced or delivered in a given amount of space or mass. In summary, energy density is the amount of energy stored, while power density is the rate at which that energy is generated or delivered.
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