Convert Mach 20 to Millimetres per Second
Convert Mach 20 (Ma20) to Millimetres per Second (mm/s) instantly and accurately.
Conversion Formula
mm/s = Ma20 × 6805800
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.
About Millimetres per Second
A millimetre per second (mm/s) is 10⁻³ m/s - the speed of slow industrial mechanisms and recognisable biological motion. FDM 3D printers move at 40-120 mm/s for perimeters and 150-300 mm/s for infill. Garden snails travel 0.5-1.5 mm/s; earthworms 3-5 mm/s. CNC finishing operations run 1-several hundred mm/s. Hydraulic precision slides work at mm/s for surface preparation. Ultrasound particle velocities in soft tissue are also in this range. 1 mm/s = 10⁻³ m/s.
Quick Reference Table
| Mach 20 (Ma20) | Millimetres per Second (mm/s) |
|---|---|
| 1 Ma20 | 6805800 mm/s |
| 2 Ma20 | 13611600 mm/s |
| 5 Ma20 | 34029000 mm/s |
| 10 Ma20 | 68058000 mm/s |
| 25 Ma20 | 170145000 mm/s |
| 50 Ma20 | 340290000 mm/s |
| 100 Ma20 | 680580000 mm/s |