A bat flying at a speed of 5.7 m/s pursues an insect flying in the same direction. The bat emits a 49000-Hz sonar pulse and hears the pulse reflected back from the insect at a frequency of (49000 + 590) Hz. Take the speed of sound to be 343 m/s. What is the speed of the insect, in meters per second, relative to the air?

This is possibly a different atmosphere from ours.  In any case, the speed of sound is computer-generated, and is 454 m/s this time.  Light travels for us instantaneously. You see a lightning flash, and 7.6 seconds later, you hear the thunderbolt.  How far away was the lightning (in meters)?

An explosion occurs at the end of a pier. The sound reaches the other end of the pier by traveling through three media: air, fresh water, and a slender metal handrail. The speeds of sound in air, water, and the handrail are 346, 1400, and 5480 m/s, respectively. The sound travels a distance of 142 m in each medium. (a) After the first sound arrives, how much later does the second sound arrive? (b) After the first sound arrives, how much later does the third sound arrive? (a) Number i (b) Number i Units Units

S X * # 3 4. A bystander hears a siren vary in frequency from 594 Hz to 388 Hz as a fire truck approaches, passes by, and moves away on a straight street. What is the speed of the truck? (Take the speed of sound in air to be 343 m/s.) X 62.7 m/s E D C 25 $ 4 888 R % 5 V tv A B 16 de MacBook Air & 7 H VO 8 UTO N A J 9 M K MOSISO O zoom 1 ge + 11 t