Understanding Energy Density and Kinetic Energy Spectrum

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Discussion Overview

The discussion revolves around the concepts of energy density and kinetic energy spectrum, exploring their definitions and applications. Participants seek to clarify these terms and how they relate to practical examples, such as capacitors and batteries.

Discussion Character

  • Conceptual clarification
  • Technical explanation
  • Exploratory

Main Points Raised

  • One participant defines energy density as the amount of energy per unit volume, providing an example with a capacitor to illustrate the calculation.
  • Another participant asks for clarification on the term "kinetic energy spectrum" and its context, indicating a lack of familiarity with the term.
  • A later reply expresses gratitude for the explanation of energy density and seeks to apply the reasoning to lithium batteries, questioning if the same calculations can be performed using battery capacity and dimensions.

Areas of Agreement / Disagreement

Participants generally agree on the definition of energy density, but the concept of kinetic energy spectrum remains unclear, with no consensus on its meaning or application.

Contextual Notes

The discussion does not resolve the assumptions or definitions related to kinetic energy spectrum, and the application of energy density to lithium batteries is still under inquiry.

Geolay
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and what is kinetic energy spectrum?
 
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Energy density is the amount of energy per unit of volume. So if I have 10 joules of energy stored in a capacitor, and the capacitor has a volume of 0.001 cubic meters, then the capacitor has an average energy density of 10 / 0.001 = 10 000 joules per cubic meter (for the electrical energy it stores, that is).

As for "kinetic energy spectrum", you're going to have to explain a little bit more. Where did you see those words together?
 
thank you.
 
Xezlec said:
Energy density is the amount of energy per unit of volume. So if I have 10 joules of energy stored in a capacitor, and the capacitor has a volume of 0.001 cubic meters, then the capacitor has an average energy density of 10 / 0.001 = 10 000 joules per cubic meter (for the electrical energy it stores, that is).
From a layman who has wandered in from the sticks, thank you. I glimmer of light for me.

Can I apply the above reasoning to say a lithium battery? i.e. convert the stated battery capacity in ampere hours and use the physical dimensions to arrive at an "energy density" for said battery, assuming I get my sums right?
 

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