Chapt. 18Waves II: Sound Waves157a) What is the frequency heard on train B if the air is still?b) What frequency is heard on train B if the air is blowing at 60 m/s (it’s hurricane force, butvery steady and nonturbulent) in the direction from train A to train B?c) What frequency is heard on train B if the wind direction is reversed?018 qfull 00800 2 5 0 hard thinking: sweet Polly Purebred6. The foul Batbird has kidnapped sweet Polly Purebred and secreted her in his lair in an unkownreach of the Carlsbad Caverns—the enormous Batbird Cave! This looks like a job for Underdog.a) Having penetrated the pitch-dark Cave, the Sober Sealyham gives gives a mighty Woof towhich the Sultry Saluki upon hearing it instantly replies with a plaintive whimper. Thetime between Woof and the reply is 2.20 s and the speed of sound is 340 m/s.What isdistance from Underdog to Polly?b) Just then the batholithic Batbird swoops at Underdog having detected his location bybat sonar. But two can play that game: the Musical Mutt, still at rest himself, emits a
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