Convert Centimetres per Second to Mach 20
Convert Centimetres per Second (cm/s) to Mach 20 (Ma20) instantly and accurately.
Conversion Formula
Ma20 = cm/s × 1.469334979e-6
About Centimetres per Second
A centimetre per second (cm/s) is 10⁻² m/s - the speed of slow animals, gentle breezes, and lab syringe pumps. Tortoises travel 0.5-1.5 cm/s; the fastest garden snail record is ~1.3 cm/s. A gentle breeze that barely moves leaves is Beaufort 1 ≈ 50-100 cm/s. Drug-delivery syringe pumps run 0.01-10 cm/s. Coarse silt settles in still water at ~0.2 cm/s (Stokes' law). Capacitive touch sensors detect finger motion at 1-10 cm/s. 1 cm/s = 0.01 m/s.
About Mach 20
Mach 20 ≈ 6,805.8 m/s (24,501 km/h) at ISA sea level - the peak heating regime of ballistic re-entry. Shock layer temperature exceeds 10,000 K; plasma sheath causes radio blackout. Space Shuttle decelerated through Mach 20 at ~75-80 km altitude; Apollo CM hit the atmosphere at ~Mach 36; ICBM warheads re-enter at Mach 18-24. DARPA HTV-2 reached Mach 20 in 2011. 1 Mach 20 = 6,805.8 m/s.
Quick Reference Table
| Centimetres per Second (cm/s) | Mach 20 (Ma20) |
|---|---|
| 1 cm/s | 1.469 × 10-6 Ma20 |
| 2 cm/s | 2.939 × 10-6 Ma20 |
| 5 cm/s | 7.347 × 10-6 Ma20 |
| 10 cm/s | 1.469 × 10-5 Ma20 |
| 25 cm/s | 3.673 × 10-5 Ma20 |
| 50 cm/s | 7.347 × 10-5 Ma20 |
| 100 cm/s | 0.000146933 Ma20 |