What is energy density?

  • Thread starter Geolay
  • Start date
  • #1
5
0
and what is kinetic energy spectrum?
 

Answers and Replies

  • #2
318
0
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?
 
  • #3
5
0
thank you.
 
  • #4
21
0
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?
 

Related Threads on What is energy density?

  • Last Post
2
Replies
49
Views
17K
Replies
6
Views
2K
Replies
2
Views
5K
  • Last Post
Replies
1
Views
3K
Replies
5
Views
2K
  • Last Post
Replies
2
Views
9K
Replies
1
Views
2K
Replies
7
Views
1K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
13
Views
2K
Top