Chapter 1 : Chapter 1 Physical Quantities
and Units In the quest to understand nature, scientists use physical quantities to describe the world around us.
contents : contents Measurement of Length
Measurement of Time
Chapter Review
Slide 3 : quantitative versus qualitative Most experiments in Physics specify that the observations made are to be quantitative rather than qualitative in nature.
Slide 4 : Physical quantities are quantities that can be measured and they consist of the following:
a numerical magnitude
a unit (kg, cm, ml etc.) actual length = 0.850 m
Slide 5 : The system distinguishes seven physical quantities as base or fundamental quantities. the SI system of units
Slide 6 : SI units for derived quantities
Slide 7 : When measuring very big or very small quantities, one of the prefixes is added to the name of the units.