Need Help?

$$

$$

$$

$19.[0/2$ Points$]$

SCalct$19145\mathrm{.}048$

A sound with frequency $f_s$ is produced by a source traveling along a line with speed $v_s.$ If an observer is traveling with speed $v_0$ along the same line from the opposite direction toward the source, then the frequency of the sound heard by the observer is

$f_0=(\frac{c{v}_0}{c-v_s})f_s$

where $c$ is the speed of sound, about $332\frac{m}{s}.($This is the Doppler effect.$)$ Suppose that, at a particular moment, you are in a train traveling at $36\frac{m}{s}$ and accelerating at $1\mathrm{.}7\frac{m}{s^2}.$ A train is approaching you from the opposite direction on the other track at $42\frac{m}{s},$ accelerating at $1\mathrm{.}3\frac{m}{s^2},$ and sounds its whistle, which has a frequency of $445$ Hz $.$ At that instant, what is the percelved frequency $($in Hz $)$ that you hear? $($Round your answer to one decimal place.$)$

Hz

How fast $($in $H\frac{z}{s})$ is it changing? $($Round your answer to two decimal places.$)$

$H\frac{z}{s}$

Need Help? $$

Request Extension