Question

What is the half-angle of a shockwave-cone for a jet travelling at Mach 1.757 16. a. 28.21 b 40.73 c. 40.07" d. 36.36 e 34.85 f. 39.07 Flying at a level where the speed of sound is 280 m/s, what is the speed (in m/s) of a jet flying at Mach 1.6? a. 448.0 m/s b. 3828 m/s c. 358.7 m/s d. 534.0 m/s e. 395.8 m/s . 404.4 m/s A sound wave moves through a medium with density 400.kg/m* when it encounters a medium with density 1000.kg/m. What percentage of the wave is reflected? Transmitted? 18. a. 0.1631 b. 0.2133 . 0.2111 d. 0.1837 e. 0.1359 f 0.1305 a. 0.8369 b. 0.7889 c. 0.8641 d. 08695 e. 08163 0.7867

Answer 1