A convertible with the top down is traveling north on a road at a speed of 21.0 m/s. A police car, traveling south at a speed of 40.0 m/s, approaches with its siren producing sound at a frequency of 2500 Hz. (Enter your answers in Hz. Assume that the speed of sound in air is 343 m/s.) (a) What frequency does the driver of the convertible observe as the police car approaches? (Enter your answer to the nearest integer.) Hz (b) What frequency does the driver of the convertible detect after the police car passes her? Hz (c) Repeat parts (a) and (b) for the case when the police car is traveling northbound. while police car overtakes after police car passes Hz Hz

Standing at a crosswalk, you hear a frequency of 570 Hz from the siren of an approaching ambulance. After the ambulance passes, the observed frequency of the siren is 488 Hz. Determine the ambulance's speed from these observations. (Take the speed of sound to be 343 m/s.)

A bystander hears a siren vary in frequency from 584 Hz to 370 Hz as a fire truck approaches, passes by, and movesaway on a straight street. What is the speed of the truck? (Take the speed of sound in air to be 343 m/s.)

A group of hikers hears an echo 3.40 s after shouting. How far away is the mountain that reflected the sound wave? (Assume the speed of sound is 342 m/s.)

An ambulance with a siren sounding at 1600 Hz drives by a bystander at the sidewalk. After being passed, the bystander hears a frequency of 1590 Hz. How fast is the ambulance moving? Assume speed of sound is 343 m/s.

A bat, moving at 3 m/s, is chasing a flying insect. If the bat emits a 40-kHz chirp and receives back an echo at 40.7 kHz, at what speed is the insect moving? (Take the speed of sound in air to be v= 343 m/s.) State your answer to the nearest 0.01m/s. NOTE: Sign of your answer matters! Both of the speeds (insect's and bat's ) are measured with respect to the stagnant air.

A group of hikers hears an echo 1.00 s after shouting. How far away is the mountain that reflected the sound wave? (Assume the speed of sound is 342 m/s.) m

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 342, 1400, and 5140 m/s, respectively. The sound travels a distance of 136 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?

Two cars are heading straight towards each other with the same speed. the horn of one sounds at a frequency of 3000 Hz but is beard by the driver of the other car as 3400 Hz. If the speed of sound is 340 m/s, find the speed of each car.

A state trooper chases a speeder along a straight stretch of road; both vehicles move at 137 km/h. The siren on the tropper's vehicle produces a sound of 564 Hz. What frequency is heard by speeder? (Take the speed of sound in air to be 343 m/s.) Number Units