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प्रश्न
What is loudness of sound? What factors does it depend on?
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उत्तर
A loud sound has high energy. Loudness depends on the amplitude of vibrations. In fact, loudness is proportional to the square of the amplitude of vibrations.
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संबंधित प्रश्न
| Column A | Column B |
| (a) Vibrations cause | (1) absorb sound |
| (b) A shriller sound is | (2) second |
| (c) Unit of frequency | (3) sound |
| (d) Unit of time period | (4) of high pitch |
| (e) Curtains | (5) hertz |
Select the correct alternative :
We can hear sound of frequency
'Note' is a sound :
Distinguish between compression and rarefaction.
Complete the following sentences :
Sound cannot travel through __________, but it requires a ___________.
The speed of light in air is :
A continuous progressive transverse wave of frequency 8 Hz moves across the surface of a ripple tank
If the wavelength of the transverse wave is 32 mm, calculate the speed with which wave travels across the surface of the water.
If the energy in a longitudinal wave travels from south to north, the particles of the medium would be vibrating in _____.
Match the following
| 1. | Infrasonic | (a) | Compressions |
| 2. | Echo | (b) | 22 kHz |
| 3. | Ultrasonic | (c) | 10 Hz |
| 4. | High-pressure region | (d) | Ultrasonography |
Find the odd one out.
