Lesson 14 of 16Article14 min
Measurement & Unit Conversion
Every real-world quantity carries a unit. Convert by multiplying by carefully chosen forms of 1 so unwanted units cancel.
Units as part of the answer
Every real-world quantity carries a unit. Convert by multiplying by carefully chosen forms of 1 so unwanted units cancel.
- Dimensional analysis: write units in the calculation, not only at the end.
- Temperature is affine (not a simple scale through zero): °C ↔ °F needs offset.
- Currency conversion is just multiplication by an exchange rate.
If units do not cancel to what you wanted, the setup is wrong — fix before computing.