On a bright winter's day, a coach notices an echo as she runs between a high school's playing field and the rear wall of its gym. She decides to estimate how far she stands from the reflective wall. She abruptly whistles and determines that the sound pulse returns to her as an echo 0.492 seconds later (averaging several trials for enhanced reliability). The air is a frigid −10°C. Six months later, the coach decides to repeat her experiment on a hot summer day, standing at the same exact spot. This time, the echo takes a slightly shorter 0.455 seconds to return to the coach. (a) What is the temperature (in °C) of the air on the summer day? °C (b) How far (in m) does the coach stand from the reflective wall? m

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
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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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On a bright winter's day, a coach notices an echo as she runs between a high school's playing field and the rear wall of its gym. She decides to estimate how far she stands from the reflective wall. She abruptly whistles and determines that the sound pulse returns to her as an echo 0.492 seconds later (averaging several trials for enhanced reliability). The air is a frigid −10°C.
Six months later, the coach decides to repeat her experiment on a hot summer day, standing at the same exact spot. This time, the echo takes a slightly shorter 0.455 seconds to return to the coach.
(a)
What is the temperature (in °C) of the air on the summer day?
°C
(b)
How far (in m) does the coach stand from the reflective wall?
m
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