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Why are sound waves known as mechanical waves?

Monjur Alahi

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Salim Ahmed Kawsar

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Sound waves are called mechanical waves because it requires material medium to propagate.

Sound is produced by the vibration of objects. When objects vibrate, it collides with the molecules in the medium. This collision produces mechanical oscillations in the medium. Because of this, sound waves are known as mechanical waves

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Why are sound waves called mechanical waves?

Sound waves are called mechanical waves because they need a material medium to travel.

1 Answers 1 views
When we change feeble sound to loud sound we increase its

(b) amplitude

1 Answers 1 views
Why do we hear the sound produced by the humming bees while the sound of vibrations of pendulum is not heard?

Humming bees produce sound by vibrating their wings which is in the audible range. In case of pendulum the frequency is below 20 Hz which does not come in the...

1 Answers 1 views
Establish the relationship between speed of sound, its wavelength and frequency. If velocity of sound in air is 340 m s–1, calculate

Derivation of formula v = ν λ.  (i) 340 = 256 λ                        λ = 1.33 m.  (ii) 340 = ν (0.85)     ...

1 Answers 1 views
What are ultrasonic waves? Name one animal which emits ultrasonic waves and explain how it uses the waves?

Ultrasonic waves are those waves which have frequency more than 20 kHz.  Bats use ultrasonic waves to fly and search for their prey at night without colliding.  Bat produces ultrasound waves in...

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Define the term ‘tone’. A person is listening to a sound of 500 Hz sitting at a distance of 450 m from the source of the sound.

Tone is the sound of single frequency.  Given,  Frequency, f = 500 Hz;  Distance, s = 450 m  Time period, T=?  T = 1/ f = 1 /500 = 0.002s  Therefore, the time interval will be 0.002...

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For sound waves, the Doppler formula for frequency shift differs slightly between the two situations:

No Sound waves can propagate only through a medium. The two given situations are not scientifically identical because the motion of an observer relative to a medium is different in the...

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A SONAR (sound navigation and ranging) uses ultrasonic waves to detect and locate objects under water.

Let the distance between the ship and the enemy submarine be ‘S’. Speed of sound in water = 1450 m/s Time lag between transmission and reception of Sonar waves = 77 s In...

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A tuning fork sends sound waves in air. If the temperature of the air increases, which of the following parameters will change ?

(c) Wavelength . EXPLANATION:  When the sound wave is being sent by a tuning fork, its displacement amplitude, frequency and the time period will remain the same even if the temperature changes....

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Two sound waves move in the same direction in the same medium. The pressure amplitudes of the waves are equal but the wavelength,

The correct answer is (a) P1= P2   EXPLANATION:  Let the cross-section area = A, if the intensity of the first wave at this cross-section = I₁ and of the second wave =...

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