Chapter 8.5, Problem 77ES

(a)

To determine

To calculate: The time delay for speakers $100ft$ from a sound source when air temperature is ${80}^{\circ }F$ and $s=21.9\sqrt{5t+2457}$ where s is the speed of sound in feet per second and t is the temperature in degrees Fahrenheit, with the help of provided table.

(b)

To determine

To calculate: The air temperature for which the table is accurate and $s=21.9\sqrt{5t+2457}$ where s is the speed of sound in feet per second and t is the temperature in degrees Fahrenheit and the table for time delay is

Distance from the sound source (in feet)	Delay (in seconds)
$20$	$0.0179$
$40$	$0.0357$
$60$	$0.0536$
$80$	$0.0714$
$100$	$0.0893$