
Physical quantities
A physical quantity is a physical property of a material or system that can be quantified by measurement. A physical quantity can be expressed as a value, which is the algebraic multiplication of a ' Numerical value ' and a ' Unit '.
2 episodes
Episodes in this category also belong to the following categories:
Heat
Melvyn Bragg discusses the history of scientific ideas about heat from fire to thermodynamics.
4 December 2008
Featuring: Simon Schaffer, Hasok Chang, Joanna Haigh
The Speed of Light
Melvyn Bragg and guests discuss the speed of light, from its first measurement in the 17th Century to Einstein’s groundbreaking ideas on relativity.
30 November 2006
Featuring: John Barrow, Iwan Morus, Jocelyn Bell Burnell