A View from the Back of the Envelope top

Speed
m/s
Scale of some things
Landmarks
Length
 Time
[ Scale | Landmarks | Other ]
Rough Draft
m/s
...
10-18 1 m / age of universe
10-17 m / 3Gy
10-16
10-15
10-14 m / 3Myr
10-13 m / 300 kyr
10-12 m / 30 kyr | m/Ts
10-11 m / 3,000 yr
10-10 m / 300 yr
10-9 m / 30 yr | crust plate movement | non-head hair growth
10-8 m / 3 yr | head hair growth
10-7 m/4mo
10-6 m/wk | m-6/s | some cytoplasmic streaming
10-5 m/day | some cytoplasmic streaming
10-4 m/3hr | flagellum driven bacteria
10-3 m/15min | m-3/s
10-2 m/min
10-1 m/10s
100 2 mi/h | 1 m / s | walking
101 20 mi/h | cars
102 200 mi/h | airplanes | sound in air (×3) | nerve signal
103 1/2 mi/s | km/s | air molecules | lunar escape
104 6 mi/s | earth escape | planets around sun | earthquake through mantle | Voyager probes
105 60 mi/s
106 600 mi/s
107 1-10% lightspeed
108 speed of light (×3)
109

A View from the Back of the Envelope
Comments encouraged. - Mitchell N Charity <mcharity@lcs.mit.edu> 

Notes:
  Voyagers were ~17km/s and 16km/s in 1995 [source][link broken].

History:
  2003-Feb-04  Flagged a broken link.
  1998.Apr.24  Added Voyagers.
  long ago     Created.