[填空题]
A space probe enters the thin atmosphere of a planet wl4g q9r*t7 kp 7s8xfo0yx2vetkh7 vu3here the speed of sound if+s: 6/ee ,+.wvua khvqs.rxzs only abqae+/,x:+.u hsfkzr.vew 6vs out 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} $