Aircraft which fly at speeds greater than the speed of sound are known as.

ultrasonic aircrafts

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supersonic aircrafts

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infrasonic aircrafts

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sonar aircrafts

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Solution

The correct option is B supersonic aircrafts
Answer is B.
A supersonic aircraft is an aircraft able to fly faster than the speed of sound. Supersonic aircraft were developed in the second half of the twentieth century and have been used almost entirely for research and military purposes.
The aerodynamics of supersonic flight is called compressible flow because of the compression associated with the shock waves or "sonic boom" created by any object travelling faster than sound.

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