cm d 70 cm c 60 cm 99 A policeman blows a whistle with a

Last updated: 6/9/2023

cm d 70 cm c 60 cm 99 A policeman blows a whistle with a frequency of 500 Hz A car approaches him with a velocity of 15 m s The change in frequency as heard by the driver of the car as he passes the policeman is Given speed of sound in air is 300 m s a 25 Hz c 100 Hz b 50 Hz d 150 Hz 100 A band playing music at a frequency ui towards a wall at a speed