[填空题]
A space probe enters the trnpq35pnjm n6 l: 5uhqcx*1* zq7 sap1 k2s mrxm8mwk2o,i,: shin atmosphere of a planet where the speed of sound is only about 35 m/s
w k2ikmsx1s: 7oa sm82 ,rm,qp (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} $