Mach 2
Double sound's velocity
Mach 2 is twice the speed of sound—roughly 1,500 miles per hour at sea level, though the exact figure varies with altitude and temperature.
The Mach number, named for physicist Ernst Mach, expresses speed as a ratio to sound's velocity.
The jet broke Mach 2 over the desert.
Anything above Mach 1 is supersonic; above Mach 5, hypersonic.
- supersonicExceeding audio velocity
- sound barrierMach one transition zone
- jetForced fluid stream
- jet engineThrust-producing aircraft powerplant
- speedRate of motion
afterburner · sonic boom · Concorde · fighter · thrust · altitude · cockpit · flight suit · breaking · barrier · velocity · SR-71 · hypersonic · turbine · aviation · air show · pilot · throttle
- military aircraftfighter jets, F-16, fighter, F-18, bomber
- Supersonic flightConcorde, sonic boom, sound barrier, SST, afterburner
- Supersonicssonic boom, sound barrier, shock wave, supersonic, supersonic flight
- Cold War AircraftB-52, MiG-21, SR-71, U-2, MiG-15
- washing machineAppliance for laundering textiles
- time machineDevice enabling temporal journeys
- vending machineAutomated product dispenser
- machine gunContinuous-fire arm
- answering machineTelephone message recorder
- slot machineCoin-operated gambling device