An observer at the ground hears thunder 10 safter he sees a lightning flash, and the thunderlasts for 8 s. How far is the observer from theclosest point of the lightning flash and what isthe minimum length of the flash? Under whatconditions would the length of the flash youhave calculated be equal to the true length?(Speed of sound is 0.34 km s-1.)

From basic physics we know, distance=speed x time. Here, let distance of the observer from the…

Answered: An observer at the ground hears thunder…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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As you zip through space in your PPS (personal propulsion suit), your pulse rate as you count it is 117 bpm (beats per minute). This high pulse rate serves as objective evidence of your excitement. However, an observer on the Moon, an expert in pulse rate telemetry, measures your pulse rate as slower. In fact, she detects only 0.525 times the rate you count and claims that you must be pretty calm in spite of everything that is going on. How fast are you moving with respect to the Moon? m/s speed relative to the Moon:
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Suppose you hear a clap of thunder 8.20 s after seeing the associated lightning strike. The speed of light in air is 3.00 ✕ 108 m/s. (a) How far are you from the lightning strike? (The speed of sound waves in air is 343 m/s.)
4. An observer is standing on the platform of a railway station. A train goes through the station without stopping. If the frequency of the train whistle decreases by a factor of 1/4 as it approaches and then passes him, calculate the speed of the train (assume the speed of sound in air = 343 m/s).
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I need the answer as soon as possible
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