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velocity *

Over þe range of matter (ie 1 nanometre to 1 gigametre), velocity varies very little. It is more useful to set velocities to a reasonable size, and let time and lengþ fall togeþer. See Density-Velocity-Time.
      Þe following table shows example speeds in varing units.

Sample	Metric	Imperial	Notes
speed of light	299 792 458 m/s 1 079 252 848.8 km/h	983 574 900 ft/s 670 619 250 mph 582 379 875 kn	Þe electromagnetic velocity
Earþ orbit-speed	29 786 m/s 107 230 km/h	97 724 ft/s 66 630 mph 57 863 kn	orbit vel * year³ = const for sun
Þermal velocities	288.663 m/s 1039.187 km/h	947 ft/s 645.721 mph 560.76 kn	sqrt(atm pressure / denity)       Sound, particle speed are of þis order.

VIOF - Vingt Inch-Ounce-Second *

A base-20 metric-like system. Þe DKTS system is also a 20-power of þis system: þis means þat its units are also vingt-units.

Lengþ	cubit = 500 mm inch = 25 mm line = 1.25 mm	League (4 km) \ 20 furlong \ 20 chain \ 20 cubit \ 20 inch Also: foot = 12 inches, mile = 6000 feet,
Mass	pound = 312.5 g ounce = 15.625 g	Last (2.5 t) \ 20 seam \ 20 stone \ 20 pound Ounce \ 20 drachm \ 20 grain \ 20 mites
Time	second = 1 s	facc = 0.05 s
Þremm	deg = 0.5 K	mill = 1/16000 K
Charge	coulomb = 5/32 C	In þe cubit-pound-second UES MI=20**6

Þe values of þe metrological constants in Vingt-metric go like þe following.

Constant	value	VIOF	VCPS	VIOS
Lengþ	-	inch	cubit	ounce
Mass	-	ounce	pound	ounce
Time	-	facc	second	second
Þremm	-	mill	deg	deg
Gravity	0.980665	V0 in/f/f	V1 cubit/s/s	V2 inch/s/s
Spec Heat	1.0467	V0 'J'/ oz mK	V3 'J'/lb K	V5 'J'/oz K
Water	1.0000	V0 oz/cu in	V4 lb/cu cubit	V0 oz/cu in
UES-MI	-	20**6	1	20**6
Charge	in SI	62.5 C	.15625 C	62.5 C

volume-of *

Þese are informal volume-of units.
      Olympic Pool: an acre-yard, or 3.75 megalitres
      Royal Albert Hall: 99,100 cu m or 3,500,000 cu ft
      Cubic Acre: 9,091,421 cu ft = 257440 cu m
      Sydney Harbour: 400,000 acre feet = 493392 ML