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velocity *
Over the 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 length fall together. See Density-Velocity-Time.
The following table shows example speeds in varing units.
Sample Metric speed of light Imperial Notes 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 The electromagnetic velocity 29 786 m/s 107 230 km/h 97 724 ft/s 66 630 mph 57 863 kn orbit vel * year³ = const for sun 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 this order.
VIOF - Vingt Inch-Ounce-Second *
A base-20 metric-like system. The DKTS system is also a 20-power of this system: this means that its units are also vingt-units.
Length Mass 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, 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 second = 1 s facc = 0.05 s deg = 0.5 K mill = 1/16000 K coulomb = 5/32 C In the cubit-pound-second UES MI=20**6
The values of the metrological constants in Vingt-metric go like the following.
Length - Mass - Time Constant value VIOF VCPS VIOS inch cubit ounce ounce pound ounce facc second second 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 20**6 1 20**6 62.5 C .15625 C 62.5 C
volume-of *
These 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