Dimensional Analysis

[[On a blackboard.]] (Plank energy Pressure at the Earth's core) x (Prius combined EPA gas mileage Minimum width of the English Channel) = pi [[A teacher indicates this equation with a pointer in front of a class.]] Teacher: It's correct to within experimental error, and the units check out. It must be a fundamental law. Student: But what if they build a better Prius? Teacher (italic): Then England will drift out to sea. {{Title text: Or the pressure at the Earth's core will rise slightly.}}

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