A supersonic aircraft flies at Mach number M = 1.5, parallel to the ground at an...

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A supersonic aircraft flies at Mach number M = 1.5, parallel to the ground at an altitude of 11 km. It passes directly over an group of unaware friends enjoying a picnic on The Downs on a cloudy summer afternoon when the temperature is 22C. How much longer will the group remain within the zone of silence? You may assume that the air properties are constant irrespective of altitude. The specific gas constant is R = 287 J kg K and the specific heat ratio is y = 1.4, and you may consider 0C = 273 K. Answers are given to the 1 nearest integer. A supersonic aircraft flies at Mach number M = 1.5, parallel to the ground at an altitude of 11 km. It passes directly over an group of unaware friends enjoying a picnic on The Downs on a cloudy summer afternoon when the temperature is 22C. How much longer will the group remain within the zone of silence? You may assume that the air properties are constant irrespective of altitude. The specific gas constant is R = 287 J kg K and the specific heat ratio is y = 1.4, and you may consider 0C = 273 K. Answers are given to the 1 nearest integer.

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