[填空题]
A space probe enters thnv 4 le3c5uveex e5).ue thin atmosphere of a planet where thzn a6.zipcigvs8g..(fb ;;ntoi .j2e-q +r rce speed of sound is only6cfaeiscir;(i.n;28.zqp vto+nz.j bg gr. - about 35 m/s
(a) What is the probe’s Mach number if its initial speed is 15000 km/h$\approx$ (Round to the nearest integer)
(b) What is the angle of the shock wave relative to the direction of motion? $^{\circ} $
