Apolice car's siren operates at a frequency of 2,000 hz. what frequency would a stationary listener observe if the police car is driving towards him at 65 mph? note vsound = fλ, where vsound (the speed of sound in air) is 345 m/s. also, 1 mile = 1.609 km.

we can use formula

where

fL is listener frequency

fs is siren frequency

va is the speed of sound in air

vs is police car speed

so, we have

now, we can change it into m/s

now, we can plug it

..............Answer

answer: 2530

hope this

costs the what? what is the cost of the pants?

step-by-step explanation:

if it is $10, then the price is 14.

take 40% of the cost, and then add the cost.

40% of 10 = 4

4+10 = 14.