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Natural Sciences · Foundational

Units & Scaling

Every measurement is a number and a unit. Learn the SI system and its prefixes, convert units without mistakes, check formulas using dimensions alone, convert between temperature scales, discover why giants can't exist, and see how scientists report measurements honestly with significant figures and uncertainties.

7 lessons~40 min0/7 complete
Start courseHelpful background: Powers & Roots
1

Units

Numbers with meaning.

  1. The SI SystemBase units and prefixes
  2. Converting UnitsMultiplying by one
  3. Dimensional AnalysisChecking physics with units alone
  4. Temperature ScalesCelsius, Fahrenheit and kelvin
2

Scaling and Measurement

Size matters, and so does precision.

  1. The Square–Cube LawWhy giants can’t exist
  2. Significant FiguresDon’t claim more than you know
  3. Measurement & UncertaintyHow sure are you?