logo
or
search
upload

A car moving at 108 km h^-1 finds another car in front of it going in the same direction at 72 km h^-1. The first car sounds a horn that has a dominant frequency of 800 Hz. What will be the apparent frequency heard by the driver in the front car ? Speed of sound in air = 330 ms^-1

Apne doubts clear karein ab Whatsapp par bhi. Try it now.
CLICK HERE

Loading DoubtNut Solution for you

Watch 1000+ concepts & tricky questions explained!

110.2 K+ views | 34.0 K+ people like this

   
Share
Share

Answer Text

Answer :
B
Solution :
According to the question velocity of car A <br> `=V_A=18 km/h=30 m/s` <br> `V_B=72km/h=20m/s, f=800Hz` <br> So, the apparent frequency heard by the car B is given by <br> `f^1=((330-20)/(330-30))xx800=826.9` <br> `=~ 827Hz`

Related Video

4:53

54.9 K+ Views | 17.0 K+ Likes

3:09

19.8 K+ Views | 900+ Likes

3:46

105.1 K+ Views | 5.2 K+ Likes

100+ Views | 7 Likes

2:24

145.9 K+ Views | 7.3 K+ Likes

5:10

100+ Views | 8 Likes

2:58

55.3 K+ Views | 2.7 K+ Likes

bottom open in app