Physics 2012 JAMB Past Questions - Question 28: Which of the following factor will affect the velocity of sound ?

Correct Answer

C

Explanation

Sound is a mechanical wave that cannot be propagated in a vacuum. A material medium like wind moving in the same direction as the sound will affect its velocity.There are several factors that can affect the velocity of sound. Some of the main factors include:

1. Temperature: Sound travels faster in warmer air compared to colder air. As the temperature increases, the molecules in the medium vibrate more vigorously, allowing sound waves to propagate faster.

2. Density of the medium: Sound travels faster in denser mediums. For example, sound travels faster in water compared to air because water is denser.

3. Humidity: Humidity, or the amount of moisture in the air, can affect the velocity of sound. Higher humidity levels can slightly decrease the speed of sound.

4. Composition of the medium: The composition of the medium through which sound travels can also affect its velocity. For example, sound travels faster in solids compared to liquids, and faster in liquids compared to gases.

5. Pressure: Changes in pressure can affect the velocity of sound. However, the effect is relatively small and is usually only significant at very high pressures.

It's important to note that these factors interact with each other, and their combined effect determines the overall velocity of sound in a given medium.