# Question: A supersonic jet flies directly overhead relative to an observer

A supersonic jet flies directly overhead relative to an observer, at an altitude of 2.0 km (Fig. 14.22). When the observer hears the first sonic boom, the plane has flown a horizontal distance of 2.5 km at a constant speed.

(a) What is the angle of the shock wave cone?

(b) At what Mach number is the plane flying? (Assume that the speed of sound is at an average constant temperature of 15°C.)

(a) What is the angle of the shock wave cone?

(b) At what Mach number is the plane flying? (Assume that the speed of sound is at an average constant temperature of 15°C.)

**View Solution:**## Answer to relevant Questions

The first three natural frequencies of an organ pipe are 126 Hz, 378 Hz, and 630 Hz. (a) Is the pipe an open or a closed pipe? (b) Taking the speed of sound in air to be 340 m/s, find the length of the pipe. An open organ pipe is 0.50 m long. If the speed of sound is 340 m/s, what are the pipe’s fundamental frequency and the frequencies of the first two overtones? Bats typically give off an ultrahigh-frequency sound at about 50 000 Hz. If a bat is approaching a stationary object at 18.0 m/s, what will be the reflected frequency it detects? Assume the air in the cave is at 5oC. Medical ultrasound uses a frequency of around 20 MHz to diagnose human conditions and ailments. (a) If the speed of sound in tissue is 1500 m/s, what is the smallest detectable object? (b) If the penetration depth is about ...Fuel trucks often have metal chains reaching from their frames to the ground. Why is this important?Post your question