An ambulance with a siren emitting a whine at 1570 Hz overtakes and passes a cyclist pedaling a bike at 2.54 m/s. After being passed, the cyclist hears a frequency of 1560 Hz. How fast is the ambulance moving? (Take the speed of sound in air to be 343 m/s.) Number i Units

Item 11 Most of the galaxies in the universe are observed to be moving away from Earth. Suppose a particular galaxy emits orange light with a frequency of 5.000 × 10¹4 Hz. Part A If the galaxy is receding from Earth with a speed of 4125 km/s, what is the frequency of the light when it reaches Earth? Express your answer to four significant figures and include appropriate units. μA Value Submit Units Request Answer ?

Current Attempt in Progress A typical adult ear has a surface area of 1.32 x 10-3 m2. The sound intensity during a normal conversation is about 3.70 x 10-6 W/m² at the listener's ear. Assume that the sound strikes the surface of the ear perpendicularly. How much power is intercepted by the ear? Number i Units

Sound travels at an estimated speed of 344 * m/s c a sound wave has a frequency of 2500 HzWhat is the distance between the crests of each wave?

Question-10.6 A train is travelling at a speed of 20.3 m/s towards a station. The train whistle sounds with a frequency of 483.9 Hz. What is the frequency of the whistle as heard by someone on the station platform? Use the speed of sound in air of 340 m/s.

3 rces The sound of normal breathing is not very loud, with an intensity of about 11 dB at a distance of 1 m away from the face of the breather. Note that in this problem sound intensity in decibels is denoted 3; intensity in W/m² is denoted I View Available Hint(s) distance Ddetect in meters. Ddetect = 3.16 m Submit Previous Answers ✓ Correct Part B In general, if a sound has intensity of 3 dB at 1 m from the source, at what distance de from the source would the decibel level decrease to 0 dB? Since the limit of hearing is 0 dB this would mean you could no longer hear it. Express the distance in terms of B. Be careful about your signs! View Available Hint(s) Submit IVE] ΑΣΦ do 3.55 3 Previous Answers X Incorrect; Try Again; 5 attempts remaining < Return to Assignment Provide Feedback P Pearson m Copyright © 2022 Pearson Education Inc. All rights reserved. | Terms of Use | Privacy Policy | Permissions | Contact Us |

An ambulance with a siren emitting a whine at 1730 Hz overtakes and passes a cyclist pedaling a bike at 2.60 m/s. After being passed, the cyclist hears a frequency of 1722 Hz. How fast is the ambulance moving? (Take the speed of sound in air to be 343 m/s.) Number i Units

Part 2: Trains & a bicycle s shown below, the red train is stationary and the green train is moving forward at a speed of 41 m/s. Between the trains is a cyclist moving forward at 14 m/s. Each train has a whistle with a frequency of 333 Hz. The air temperature is 28°C. A.) What is the frequency from the red train's whistle as heard by the bicyclist? B.) What is the frequency from the green train's whistle as heard by the bicyclist?

The n vs. f graph below is for a newly discovered material. Please note that the metric prefix "T" represents "tera-". 1 THz = 10¹2 Hz. n vs. f GRAPH n In this material, which frequency has the greatest speed? In this material, which frequency has the lowest speed? 700 2.0 1.9 1.8 1.7 1.6 500 600 f(THz) 800

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