Energy Density Ratio

The Energy Density Ratio is a measure of how efficiently a substance or system can convert energy into motion.

It's calculated by dividing the energy output by the energy input. Simple, right?

Here's a table to break it down:

Energy Source	Energy Density Ratio
Coal	0.5
Gasoline	0.8
Hydroelectric Power Plant	0.9

Want to know more about the intricacies of energy density?

Learn about the thermodynamic principles behind it

Or, if you're feeling adventurous, you can read our completely-made-up and utterly-absurd parody of the Energy Density Ratio