Explain the Physics of a Phenomenon You Observe Every Day

Physics is present in everything you observe and experience, but its explanations are usually presented either as equations or as oversimplifications that leave out the interesting parts. This explains the mechanism of a specific everyday phenomenon step by step without equations, includes the counterintuitive implication once you understand it, connects it to a completely different phenomenon governed by the same principle, and names the thing physicists still find interesting about it.

I want to understand the physics of something I observe or experience regularly: {EVERYDAY_PHENOMENON} [for example: why the sky is blue, how a bicycle stays upright while moving, why ice melts in a drink, why music from a moving car changes pitch as it passes].

Explain the physics:
1. The governing principle: which branch of physics governs this phenomenon and the specific principle or law at work, in one sentence
2. The plain English mechanism: how the phenomenon actually works, step by step, without equations
3. The surprising implication: one thing about this phenomenon that is counterintuitive or surprising once you understand how it works
4. What the phenomenon shares with something completely different: one other everyday phenomenon that is governed by exactly the same physical principle, and how they connect
5. The unanswered question: one thing about this phenomenon that physicists still find interesting or that is less settled than the basic explanation suggests