Answer:
The truck's speed is 4.04 m/s.
Explanation:
Given that,
Emit frequency = 600 Hz
Beat = 7.00 beat/sec
We need to calculate the truck's speed
Using formula of speed
[tex]\text{frequency observed}=\text{frequency emitted}\times\dfrac{v}{v+v_{source}}[/tex]
Where, v = speed of sound
Put the value into the formula
[tex](600-7)=600\times(\dfrac{343}{343-v_{truck}})[/tex]
[tex]v_{truck}=\dfrac{600\times343-593\times343}{593}[/tex]
[tex]v_{truck}=4.04\ m/s[/tex]
Hence, The truck's speed is 4.04 m/s.
