[填空题]
A space probe enters the thin atmoh;zw2 qt/x )cssphere of fhpbslt )z/7 w p,q:2ca planet where the speed of sound is st qbpzh ,fp7/:w)2lconly 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} $