Vocabulary 1
exponential notation.
n
10 = 1 and n zeros for n > 0
1 for n = 0
1/(1 and n zeros) for n < 0
4 -3
For example, 10 = 10000 and 10 = 1/1000 = 0.001.
prefixes: -1
deci-(d) 10
-2
centi-(c) 10
-3 3
milli-(m) 10 kilo-(k) 10
-6 6
micro-(m) 10 mega-(M) 10
-9 9
nano-(n) 10 giga-(g) 10
-12
pico-(p) 10
-15
femto-(f) 10
order of magnitude sizes in meters:
0 10 humans 1 10 trees 3 -4 10 mountains 10 cells 7 -6 10 diameter of the earth 10 bacteria 12 -9 10 radius of earth orbit 10 molecules 16 -10 10 distance light travels in a year 10 atoms 17 -15 10 distance to the nearest star 10 nuclei 22 10 distance to nearest galaxy 26 10 size of the observable universe acoustics noise pitch treble bass loudness vibration wave longitudinal transverse compressions rarefactions wavelength speed of sound nondispersive medium pressure force one atmosphere