deacelaj4678 deacelaj4678
  • 01-09-2017
  • Physics
contestada

The speed of sound in air is 331 m/s. what is the plane's speed in terms of the speed of sound?

Respuesta :

hankaF
hankaF hankaF
  • 14-09-2017
The initial speed, u of plane in terms of velocity of sound which may be taken as U
u=142/331=0.429*U
It crosses the sound barrier after says t seconds then we have 331-142=23.1*t or t is given 8.18 s exactly t=9/11s.
After 18 seconds the plane will traveling with velocity V
V=142+18*23.1=557.8 m/s==1.685*U
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