A View from the Back of the Envelope top

Millimeters in your hands
10-3 meters per mm (no magnification)
Scaling the universe to your desktop
How Big Are Things?
Length Area Volume Speed
10 [ -6 | -3 | 0 | 3 | 6 | 9 | 12 | 15 | 18 ]
100 meters per meter

1 mm
10 mm
100 mm
1000 mm
10-3 m
0.3 mm

316 um		 3 mm
0.3 cm
3162 um
10-2 m
32 mm
3 cm
10-1 m
316 mm
0.3 m
100 m
3162 mm
3 m
Sugar grain
1 mm 		19 x 1 mm
marble
Your finger tip.
 1 liter
can
67 x 122 mm
Your hand.
 You
1 mm per mm
Actual size (though rough, as screen resolution varies).

1/2 lt·ns (ticks every 1/10 light-nanosecond (lt·10-9s))
0 1/10 2/10 3/10 1/2 lt·ns

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

Doables:
 Flesh out, elaborate, and explain.
 List/picture useful shape/size reference objects.
 Hanging a cubic meter from ceiling, and making desktop references.
 Discuss velocity here?
 In -6, add ruler.

History:
 2001.Apr.20  Added link to `How Big Are Things?'.
 1998.Jun.17  Corrected error with magnitude boundaries (3.333->3.162).
 1998.Apr.01  Added real-size can; penny & can dimensions.
 1997.Aug.28  Added some images.
 1997.Aug.25  Another format change.  Cruftier but clearer.
 1997.Aug.19  Another format change.
 1997.Aug.17  Fiddled with format.  Added viruses.
 1997.Aug.13  Created.  Not bad for an afternoon's scribbling.