A source of sound is moving directly away from you: you are stationary relative to the still air through which the sound travels. Which of the following statements about the speed of the sound you receive from the moving source is true?
Properties of sound
A sound wave is a mechanical wave (or mechanical vibration) that transit through media such as gas (air), liquid (water), and solid (wood).
Quality Of Sound
A sound or a sound wave is defined as the energy produced due to the vibrations of particles in a medium. When any medium produces a disturbance or vibrations, it causes a movement in the air particles which produces sound waves. Molecules in the air vibrate about a certain average position and create compressions and rarefactions. This is called pitch which is defined as the frequency of sound. The frequency is defined as the number of oscillations in pressure per second.
Categories of Sound Wave
People perceive sound in different ways, like a medico student takes sound as vibration produced by objects reaching the human eardrum. A physicist perceives sound as vibration produced by an object, which produces disturbances in nearby air molecules that travel further. Both of them describe it as vibration generated by an object, the difference is one talks about how it is received and other deals with how it travels and propagates across various mediums.
A source of sound is moving directly away from you: you are stationary relative to the still air through which the sound travels. Which of the following statements about the speed of the sound you receive from the moving source is true?
- Its speed in the air deceases because of the motion of the source of sound.
- Its speed could increase or decrease depending on the frequency of the source.
- Its speed in the air increases because of the motion of the source of sound.
- Its speed in the air could increase or decrease depending on the power emitted by the source.
-
Its speed in the air is unchanged by the motion of the source of sound.
Trending now
This is a popular solution!
Step by step
Solved in 3 steps
