Hacker News
- Chaos Hypertextbook https://hypertextbook.com/chaos/ 11 comments
- English Units of Measure http://hypertextbook.com/physics/foundations/system-english/ 9 comments
- How do you calculate the density of the universe? http://hypertextbook.com/facts/2000/ChristinaCheng.shtml 7 comments askscience
- In honor of a Bestof 2013 question: How long would a photosynthetic human have to lay outside to meet their daily energy requirements? http://hypertextbook.com/facts/2001/IgorFridman.shtml 9 comments askscience
- Why do astronauts need cooling systems in their suits (calculations in text)? http://hypertextbook.com/facts/2003/WeiLiangMok.shtml 32 comments askscience
- Why aren't there pools of Liquid CO2 at the coldest parts of the Earth? http://hypertextbook.com/facts/2000/YongLiLiang.shtml 16 comments askscience
- Would anyone be willing to help me learn some biophysics? I would like to know how much energy is expended from the firing of a neuron. http://hypertextbook.com/facts/2000/AmberIqbal.shtml 17 comments askscience
- When determining if an electrical current is dangerous, what are the factors? DC vs AC, Volts vs Amps, points of contact... http://hypertextbook.com/facts/2005/GinaCastellano.shtml 6 comments askscience
- Einstein's four letters to FDR (1939 - 1945) http://hypertextbook.com/eworld/einstein.shtml 7 comments history
- Acceleration Due to Gravity: Super Mario Brothers http://hypertextbook.com/facts/2007/mariogravity.shtml 3 comments science