Question

An observer moves towards a stationary source of sound, with a velocity one-fifth the velocity of sound. What is the percentage increase

Answer 1

Answer:

Explanation:the violecity of sound must be increased by the main wavelenght of object

Answer 2

the displacement time graph of a leaf climbing from the group flow to the top of the building is giving in the fingers using this graft answer the following what is the state of motion at ABC