Which of the following statement(s) is/are true with respect to the speed of sound at 25°C in different mediums? A. In steel, the speed of sound is 5960 m/s. B. In nickel, the speed of sound is 6040 m/s.

Which of the following statement(s) is/are true with respect to the speed of sound at 25°C in different mediums? A. In steel, the speed of sound is 5960 m/s. B. In nickel, the speed of sound is 6040 m/s. Correct Answer Both A and B are true.

The correct answer is Both A and B are true.

Key Points

  • Speed of Sound
    • In a medium, the speed of sound depends upon the elasticity and density of the medium.
    • When sound enters from one medium to another medium, its speed and wavelength change but frequency remains unchanged.
    • In a medium, the speed of sound is independent of frequency.
    • Speed of sound is maximum in solids and minimum in gases.
    • The speed of sound is more in humid air than in dry air because the density of humid air is less than the density of dry air.
    • The unit of loudness is the decibel (dB).
    • Effect of pressure on the speed of sound:
      • The speed of sound is independent of pressure.
    • Effect of temperature on the speed of sound:
      • The speed of sound increases with the increase of the temperature of the medium.
    • In steel, the speed of sound is 5960 m/s. Hence, option A is correct
    • In nickel, the speed of sound is 6040 m/s. Hence, option B is correct.

Important Points

In any medium, if the temperature increases, the speed of sound also increases and vice versa.

Speed of sound in different media at 25 ºC
State Medium Speed of sound (m/s)
Solid
Solids Aluminium 6420
Nickel 6040
Steel 5960
Iron 5950
Brass 4700
Glass (Flint) 3980
liquid
Liquids Water (Sea) 1531
Water (distilled) 1498
Ethanol 1207
Methanol 1103
gas
Gases Hydrogen 1284
Helium 965
Air 346
Oxygen 316
Sulfur dioxide 213

https://ncert.nic.in/ncerts/l/iesc112.pdf

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