Q17 of 199 Page 185

A jet aircraft flies at a speed of 410 m/s. What is this speed known as?

A jet aircraft flies at a speed of 410 m/s. Its speed is known as supersonic.


More from this chapter

All 199 →
15

What is the speed of sound :

(a) in air?


(b) in water?


(c) in iron?

 16

What name is given to those aircrafts which fly at speeds greater than the speed of sound?

 18

What is meantby supersonic speed?

 19

State one observation from everyday life which shows that sound travels much more slow than light.