In which medium the speed of sound will be maximum?
Aluminium
Understanding Speed of Sound in Different Materials
The speed at which sound travels depends heavily on the medium it is passing through. Sound waves need a medium (like a solid, liquid, or gas) to propagate. They cannot travel through a vacuum.
In general, the speed of sound is fastest in solids, slower in liquids, and slowest in gases. This is because the particles in solids are much closer together and more strongly bonded than in liquids or gases. This close proximity and strong bonding allow vibrations (sound waves) to be transmitted more quickly from one particle to the next.
Within the same state of matter (like solids), the speed of sound is influenced by the material's elasticity (how well it resists deformation) and density (mass per unit volume). Materials that are less compressible (more elastic) and less dense tend to transmit sound faster.
Comparing Speed of Sound in Given Options
We are given four options: Water, Copper, Steel, and Aluminium. Let's look at the approximate speed of sound in each of these materials under standard conditions (like room temperature):
| Medium | State | Approximate Speed of Sound (m/s) |
|---|---|---|
| Water | Liquid | 1480 |
| Copper | Solid | 4760 |
| Steel | Solid | 5960 |
| Aluminium | Solid | 6420 |
Comparing the values from the table:
- Speed of sound in Water = 1480 m/s
- Speed of sound in Copper = 4760 m/s
- Speed of sound in Steel = 5960 m/s
- Speed of sound in Aluminium = 6420 m/s
From this comparison, it is clear that Aluminium has the highest speed of sound among the given options (1480 < 4760 < 5960 < 6420).
Conclusion: Maximum Speed of Sound
Based on the typical speed of sound in different materials, sound travels fastest in solids compared to liquids and gases. Among the given solid options (Copper, Steel, Aluminium) and the liquid option (Water), Aluminium exhibits the highest speed of sound. Therefore, the speed of sound will be maximum in Aluminium.
Important Questions from The Speed of Sound
An object is 10.64 km below the sea level. A research team sends down a sonar signal to confirm this depth. After how long can it expect to get the echo? Take speed of sound in sea water = 1520 m/s.
A boy stands 83 m in front of a high wall and then blows a whistle, calculate the time interval when he hears an echo. Speed of sound is 332 m/s.
A man claps his hands in front of a wall and he hears an echo after 1.6s. He walks. 33m towards wall and hears the echo 1.4 s after clapping. Then velocity of sound in air is:
For hearing a distinct sound, the time interval between the original sound and the reflected one must be atleast ______ seconds.
The speed of a longitudinal wave in a solid bar is given by v = √(X/ρ), where 'ρ' is density of the medium. What is the unknown term 'X'?
