mach

¹

Or Mach

[mahk]

noun

1. mach number.

Mach

²

[mahk, mahkh]

noun

1. Ernst 1838–1916, Austrian physicist, psychologist, and philosopher.

mach.

³

abbreviation

1. machine.

2. machinery.

3. machinist.

Mach

¹

/ mæk /

noun

1. short for Mach number

Mach

²

/ max /

noun

1. Ernst (ɛrnst). 1838–1916, Austrian physicist and philosopher. He devised the system of speed measurement using the Mach number. He also founded logical positivism, asserting that the validity of a scientific law is proved only after empirical testing

Mach

1. Austrian physicist and philosopher who experimented with supersonic projectiles and the flow of gases, obtaining early photographs of shock waves and gas jets. His work laid an important foundation for later developments in the science of projectiles and aeronautical design, and the Mach number and Mach bands were named for him.

Word History and Origins

Origin of Mach¹

After Ernst Mach

Example Sentences

Mach Van Si, a farmer in Dak Lak, told AFP: "Our neighbourhood was completely destroyed. Nothing was left. Everything was covered in mud."

Read more on BBC

In the hard-hit mountainous province of Dak Lak, 61-year-old farmer Mach Van Si said the floodwaters left him and his wife stranded on their sheet-metal rooftop for two nights.

Read more on Barron's

Known as Overture, the aircraft is designed to cruise at Mach 1.7 on transoceanic routes, or twice as fast as today’s airliners.

Read more on The Wall Street Journal

Creating hypersonic aircraft requires a much deeper understanding of how air behaves at Mach 5, Mach 6, or even Mach 10.

Read more on Science Daily

Some military aircraft already reach speeds of Mach 2 or Mach 3, which means two or three times the speed of sound.

Read more on Science Daily

When To Use

How fast is Mach 1?

A Mach number is the ratio of an object's speed in a given medium to the speed of sound in that medium.Mach 1, then, is the speed of sound, around 761 mph at sea level on a standard day. The term is also used as a metaphor for high speeds more generally.How to pronounce Mach 1[ mahk wuhn ]