Question

You are hiking along a trail in a wide, dry canyon where the outdoor temperature is T = 29° C. To determine how far you are away from the canyon wall you yell “Hello” and hear the echo t = 2.2 s later. If you stood at the same point on a cold morning where the temperature was T₂ = -7.5 degrees C, how long would it have taken for you to hear the echo, in seconds?

Answer 1