- What is Entropy? (johncarlosbaez.wordpress.com)
It’s easy to wax poetic about entropy, but what is it? I claim it’s the amount of information we don’t know about a situation, which in principle we could learn. But how can we make this idea precise and quantitative? To focus the discussion I decided to tackle a specific puzzle: why does hydrogen gas at room temperature and pressure have an entropy corresponding to about 23 unknown bits of information per molecule?
- Osama bin Laden (Wikipedia)
Osama bin Laden (10 March 1957 – 2 May 2011) was a Saudi Arabian-born Islamist dissident and militant leader who was the founder and first general emir of al-Qaeda. Ideologically a pan-Islamist, he participated in the Afghan jihad against the Soviet Union and supported the activities of the Bosnian mujahideen during the Yugoslav Wars. After issuing his declaration of war against the Americans in 1996, Bin Laden began advocating attacks targeting U.S. assets in several countries, and supervised al-Qaeda’s execution of the September 11 attacks in the United States in 2001.
- Entropy (Wikipedia)
Entropy is a scientific concept, as well as a measurable physical property, that is most commonly associated with a state of disorder, randomness, or uncertainty. The term and the concept are used in diverse fields, from classical thermodynamics, where it was first recognized, to the microscopic description of nature in statistical physics, and to the principles of information theory. It has found far-ranging applications in chemistry and physics, in biological systems and their relation to life, in cosmology, economics, sociology, weather science, climate change, and information systems including the transmission of information in telecommunication.