A dolphin swims directly at a reef in the water of low visibility, using its echolocation by sending out sound ahead of it at a frequency of 1900Hz. The combination of the emitted sound and the echoed sound produces “beats” that the dolphin hears 8 times per second. Find the speed of the dolphin. The speed of sound in sea water is approximately 1550 m/s.

Two trains approach each other, each train traveling at 26 m/s.  The engineer on one train sounds his horn which has a frequency of 163Hz.  What frequency does a passenger on the second train hear? Use 340 m/s for the speed of sound in air

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

A car alarm is emitting sound waves of frequency 520 Hz. You are on a motorcycle, traveling directly away from the parked car. How fast must you be traveling if you detect a frequency of 490 Hz? (Take the velocity of sound in air as 344 m/s.)

The light intensity (1.006x10^2) cm from a point source is (1.4794x10^0) kW/m². What is the intensity (3.73221x10^2) m away from the same source? Express your result with four significant figures in W/m2.

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

A plane approaches you at 760 mi/h. It produces a sound at a frequency of 256 Hz. What frequency do you hear?  Let the speed of sound be 343 m/s, 1 mile = 1609.34 m, 1 hr = 3600 s

During a thunderstorm, 5.9 s elapses between observing a lightning flash and hearing the resulting thunder. Approximately how far away in kilometers and miles was the lightning flash? (Assume the speed of sound is 344 m/s.)

A bicydist is traveling at t m/s towards a car at rest. if the dniver blows her horn at a frequency. of l627 Hz, what frequency in Hz does the bicyclist hear? Speed of Sound is 343 m/S

Standing at a crosswalk, you hear a frequency of 590 Hz from the siren of an approaching ambulance. After the ambulance passes, the observed frequency of the siren is 501 Hz. Determine the ambulance's speed from these observations. (Take the speed of sound to be 343 m/s.) m/s