Section 2: Scientific Notation and SI Prefixes

Section 2: Units, Scientific Notation, and SI Prefixes Quantities Types of measurements7 SI Base UnitsLength (m)Mass(not weight) (kg)Temperature (K)Time (s)Mole (mol)Luminosity (cd candela)Electricity (amp ampere)Derived UnitsVolume (m3)Speed (m/s)Flow Rate (kg/s)Area (m2)Force (N)Acceleration (m/s2)Momentum (kgm/s)Magnetic Flux (T/m2)And many many more!!!

Scientific Notation: Used to express very large or very small numbers.Example: 2 x 104mHow scientific notation is derived for larger numbers:10 x 10 =10 x 10 x 10 = 10 x 10 x 10 x 10 = 2 x 10 x 10 x 10 x 10 = Easy way for BIG numbers:2,000,000 =3900 = 20.5 = 49000000000 =How scientific notation is derived for small numbers:Ex) 3 x 10-4m

1/10 = 1/ 100 = 1/ 1000 = 3/1000 = Easy way for SMALL numbers.000345.009.000000007832.00000000000000000000002973SI Prefixes: Used to express Very large and Very small numbersExamples: 1000km 30mg55 cm7.8 ns

Zinc oxide balls used in solar panels used to scatter and trap light:15nm across

NASA's Hubble Space Telescope reveals the center of the magnificent barred spiral galaxy NGC 1512 in all wavelengths from ultraviolet to infrared. The colors (which indicate differences in light intensity) map where newly born star clusters exist in both 'dusty' and 'clean' regions of the galaxy. 1 YM across

(Optional)Write the following without SI Prefixes2 km3 nm5320 ms2800 am40 Mg45 cm