Question Answers

Sahay Sir > Question Answers > MTG NEET Physics > Part 1 > Chapter 17 - Wave Motion > A stationary source is emitting sound at a fixed frequency f0 , which is reflected by two cars approaching the source. The difference between the frequencies of sound reflected from the cars is 1.2% of f0 . What is the difference in the speeds of the cars (in km per hour) to the nearest integer ? The cars are moving at constant speeds much smaller than the speed of sound which is 330ms−1 .

A stationary source is emitting sound at a fixed frequency f0 , which is reflected by two cars approaching the source. The difference between the frequencies of sound reflected from the cars is 1.2% of f0 . What is the difference in the speeds of the cars (in km per hour) to the nearest integer ? The cars are moving at constant speeds much smaller than the speed of sound which is 330ms−1 .

A stationary source is emitting sound at a fixed frequency f0 the radii are in the ratio 3:1 and the densities are in the ratio 1:2. The ratio of their fundamental frequencies is Two wires are kept tight between the same pair supports. The tensions in the wires are in the ration 2:1