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. An aircraft travelling at 600 km/h accelerates steadily at 10 km/h per second. Taking the speed of sound as 1100 km/h at the aircraft’s altitude, how long will it take to reach the ‘sound barrier’ ?

Answer» 50 seconds.Explanation:The ACCELERATION of AIRCRAFT in km/h²Now, to cross sound BARRIER,final velocity, = 1100 km/hinitial velocity, = 600 km/hacceleration, = 36000 km/h²So, ACCORDING to the formula


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