AP Physics. Chapter 1: Measurement. Intro to Physics. Classical Physics- Mechanics (Newton) Thermodynamics (Watt/Carnot/Diesel) Optics (Huygens/Young/Fresnel) Electricity and Magnetism (Maxwell) Solid understanding Prior to 1900’s. Intro. Modern Physics Late 1800’s
Chapter 1: Measurement
[Bohr, Heisenberg, deBroglie, Schrodinger etc)
Standardized System of Measurement allows collaboration/repetition/verifcation
Basic Quantities- (Mechanics)
Length Mass Time
Derived Quantities- Combinations of basics
Ex: Force = mass x length/time2
(Le Systeme International d’unites- SI)
See Table 1.4 (page 7)
KNOW 10-9 - 109 (reference for others)
Generally used for numbers smaller/larger than
10-3 - 103
Ex: Theory of Matter
(1 u = 1.660 538 7 x 10-7 kg)
Length (L) Mass (M) Time (T)
Area (L2) Volume (L3) Speed (L/T) Accel (L/T2)
Deriving/Verifying Expressions- Dimensions treated as algebraic quantities, same on both sides of expression.
Only add/subtract like dimensions.
Ex: 1 mi = 1609 m
Units are also treated as algebraic quantities.
Ex: Convert 5’ 10” -> m
Ex: Find the area of 10.0 m ± 0.1 m by 5.0 m ± 0.1 m