While standing at a crosswalk, you hear a frequency of 510 Hz from an approaching police car. After the police car passes, its frequency is 460Hz. What is the speed of the police car? (speed of
sound = 340 m/s)

v = 17.68 m/s

Explanation:

Given that,

While standing at a crosswalk, you hear a frequency of 510 Hz from an approaching police car.

After the police car passes, its frequency is 460Hz.

We need to find the speed of the police car.

The formula is as follows :

Put all the values,

So, the speed of the police car is 17.68 m/s.

i'm just gonna leave this comment here, so i can get a challange done-

explanation:

as a general rule, scissors have blades less than 6 in (15 cm) long and usually have handles with finger holes of the same size. shears have blades scissors used to cut hair or fabric must be much sharper.