A fire truck with sirens on, is driving north on a street. A car is driving...
A bystander hears a siren vary in frequency from 562 Hz to 394 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.)
You are driving at a velocity of 95 MPH (42.5 m/s) when you hear a police siren behind you. From your previous run-ins with the law, you know that at a particular point in the sound, the police sirens on the police cars in your town emit a frequency of 751.255 Hz. You hear the sound at a frequency of 752.551 Hz. How fast the the police car going (in m/s)? (Assume that the speed of sound is 343 m/s.)
You are driving a massive truck and become stuck at a railway crossing. Your truck completely blocks the railway tracks, which extend in a straight line in both directions. You hear a train approaching when it toots its horn. (a) Let /1 be the intensity of the sound you hear from the horn initially, and 12-70 dB the sound when the train is at half the original distance. ) Calculate the intensity of the horn, 11, in dB. i) Calculate...
A bystander hears a siren vary in frequency from 550 Hz to 364 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.) m/s b. A trailer truck traveling east at 20.0 m/s sounds a 800 Hz horn. What is the wavelength of the sound heard by a stationary listener located west of the truck? (The speed...
The siren of a fire engine that is driving northward at 30.0 m/s emits a sound of frequency 2020 Hz. A truck in front of this fire engine is moving northward at 17.0 m/s. What is the frequency of the siren's sound that the fire engine's driver hears reflected from the back of the truck? What wavelength would this driver measure for these reflected sound waves?
bystander hears a siren vary in frequency from 574 Hz to 358 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.)
The siren of a fire engine that is driving northward at 32.0 m/s emits a sound of frequency 2120 Hz . A truck in front of this fire engine is moving northward at 20.0 m/s .What wavelength would this driver measure for these reflected sound waves?
The siren of a fire truck at rest emits at a predominant frequency of 1950 Hz. What frequency will you hear if you are at rest and the fire truck car moves at 20.5 m/s (a) toward you? The temperature of that day is 20°C so use Vsound 343 m/s. Please submit your answer with the correct number of significant figures and the corresponding units
The siren of a fire engine that is driving northward at 30.0m/s emits a sound of frequency 2000Hz . A truck in front of this fire engine is moving northward at 21.0m/s .
Sound Waves- In class Qui 1. What is the frequency heard by a person driving at 15 m's toward a blowing factory whistle C the speed of sound is 340.6 m/s? (800. Hz) if 2. F rom the previous problem, what frequency would he hear after passing the factory if he continues at the same speed? 3. Determine the speed of a wave that is travelling with a frequency of 400Hz and has a wavelength of 45m. 4. A cop...