Leigh Kimmel’s Reviews > Energy and Civilization: A History > Status Update
Leigh Kimmel
is on page 4 of 552
An introduction on just how fundamental energy is to life -- the energy of nuclear fusion powering a G-class star 93 million miles from Earth, which provides light energy that powers photosynthesis of carbohydrates in plants, which in turn provides energy for the herbivores that eat them, and the carnivores that eat those animals.
— 20 hours, 6 min ago
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Leigh’s Previous Updates
Leigh Kimmel
is on page 14 of 552
Key concepts: Energy density, or why lionesses don't chase mice and humans don't subsist entirely on fruit. Power density, or how much can be generated in a given area. Conversion efficiency -- changing from one kind to another is inherently lossy, as generation or consumption involves various kinds of friction or inefficiency. Waste heat, waste volume, whatever.
— 58 minutes ago
