If the speed of sound in air is $338\frac{m}{s}$ in this situation, the apparent frequency heard by the injured person, expressed to three significant digits, is $Hz.$

$($Record your three$-$digit answer in the numerical$-$response section below.$)$

Your answer:

An ambulance is traveling at $115k\frac{m}{h}$ down the highway, headed towards an injured person. The ambulance siren has a true frequency of $800Hz.$

$6.$ The frequency of sound the injured person would hear as the ambulance travels toward them would be

lower than $800Hz.$

higher than $800Hz.$

different than $800Hz.,$ but the speed of sound is needed to determine whether it will be higher or lower

$7.$ If the speed of sound in air is $338\frac{m}{s}$ in this situation, the apparent frequency heard by the injured person, expressed to three significant digits, is $Hz.$

$($Record your three$-$digit answer in the numerical$-$response section below.$)$

Your answer: