Physics & Reality

Activation Energy: Favourable Is Not the Same as Likely

Paper on a table will not burn, though burning releases energy. Something has to supply the initial push — and most stalled intentions are barriers, not disagreements about value.

Relativity: One Stubborn Fact and Everything That Follows

Light measures the same speed however fast you are moving. Take that seriously and distance and time have to bend — which is why your phone's position fix depends on the theory working.

The Observer Effect: Measuring Something Touches It

Checking a tyre's pressure lets out a little air, so the reading is never quite what was there before. With objects that hardly matters. With people it can be larger than what you were trying to measure.

Half-Life: Why the Last Bit Takes So Long to Go

An afternoon coffee still has an eighth of its caffeine in you the next morning. Anything that loses a constant proportion per period behaves this way — including skills and knowledge.

Entropy: Why Order Is Always the Expensive Option

A bicycle left in a field rusts; a rusted bicycle never un-rusts. That asymmetry governs warehouses, codebases, and institutions just as strictly as it governs steel.