Skip to content

Course home

Units
x

What a measurement needs

What a measurement needs

Conversion map linking h to min to s, m to cm, and showing that 1 Bq is 1 decay per second with A = N/t

A measurement always needs a number and a unit. Writing "10" alone is incomplete because it could mean 10 s10 \, \text{s}10s, 10 cm10 \, \text{cm}10cm or 10 Bq10 \, \text{Bq}10Bq.

Units Lesson

  1. IGCSE
  2. /Physics
  3. /Units

Step-by-step lessons covering Edexcel IGCSE Physics Units for IGCSE Physics. Each lesson works through exam-style questions in Paper 1 and Paper 2 format. Build a strong foundation in mechanics and electricity before tackling the more mathematically demanding astrophysics and nuclear topics.