[填空题]
A space probe enters the thin atmosphere of a planetgi,w3j dg5okfwjv4h)hv o :; * where the speed of sospya (zqqa1 yn0;0e 4wund is 1s;qn (ya 0qwye pa04zonly 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} $