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8. A boy leaning out of his top-floor window one day accidentally knocks a flowerpot from the windowsill and he hears the sound of the crash 2.5 s later. The boy can use this time to calculate the height of his window. What is the approximate height of the windowsill above the ground? A. 20 m B. 25m C. 30 m D. 40 m

8. A boy leaning out of his top-floor window one day accidentally knocks a flowerpot from the windowsill and he hears the sound of the crash 2.5 s later. The boy can use this time to calculate the height of his window. What is the approximate height of the windowsill above the ground? A. 20 m B. 25m C. 30 m D. 40 m

College Physics
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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8. 9. A boy leaning out of his top-floor window one day accidentally knocks a flowerpot from the windowsill and he hears the sound of the crash 2.5 s later. The boy can use this time to calculate the height of his window. What is the approximate height of the windowsill above the ground? A. 20 m In the last question the boy realizes that in his calculations for height (h) he has neglected the effect of air resistance and also the time it took for the sound to travel to his ear. A better value for h could be obtained by allowing for the following: A B C D B. 25m C. 30 m Allowing for the speed of sound Time should be shorter than measured, true h would be smaller Time should be longer than measured, true h would be smaller Time should be shorter than measured, true h would be larger Time should be longer than measured, true h would be larger D. 40 m Allowing for air resistance Time should be longer than measured, true h would be larger Time should be shorter than measured, true h would be larger Time should be longer than measured, true h would be larger Time should be shorter than measured, true h would be smaller
Transcribed Image Text:8. 9. A boy leaning out of his top-floor window one day accidentally knocks a flowerpot from the windowsill and he hears the sound of the crash 2.5 s later. The boy can use this time to calculate the height of his window. What is the approximate height of the windowsill above the ground? A. 20 m In the last question the boy realizes that in his calculations for height (h) he has neglected the effect of air resistance and also the time it took for the sound to travel to his ear. A better value for h could be obtained by allowing for the following: A B C D B. 25m C. 30 m Allowing for the speed of sound Time should be shorter than measured, true h would be smaller Time should be longer than measured, true h would be smaller Time should be shorter than measured, true h would be larger Time should be longer than measured, true h would be larger D. 40 m Allowing for air resistance Time should be longer than measured, true h would be larger Time should be shorter than measured, true h would be larger Time should be longer than measured, true h would be larger Time should be shorter than measured, true h would be smaller
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