Amotorcycle and a police car are moving toward one another. the police car emits sound with a frequency of 523 hz and has a speed of 32.2 m > s. the motorcycle has a speed of 14.8 m > s. what frequency does the motorcyclist hear?

To solve this problem it is necessary to apply the concepts related to Dopler's Law. Dopler describes the change in frequency of a wave in relation to that of an observer who is in motion relative to the Source of the Wave.

It can be described as

c = Propagation speed of waves in the medium

= Speed of the receiver relative to the medium

= Speed of the source relative to the medium

Frequency emited by the source

The sign depends on whether the receiver or the source approach or move away from each other.

Our values are given by,

Velocity of car

velocity of motor

Velocity of sound

Frequency emited by the source

Replacing we have that

Therefore the frequency that hear the motorcyclist is 601.7Hz

the higher the current the higher the mag field around it the higher the influence on the compass