1. Loudness is determined by the
_______ of vibration.
2. The SI unit of frequency is _________.
3. Sound cannot travel through _______.
4. The shrillness of a sound is determined by the _______ of vibration
5. In human beings, sound is produced by __________.
6. The _________ nerve is also present in the inner car
7. The speed of sound is maximum in _______ mediuni.
& Plantation on the roadside can reduce ___________.
Answers
Answer:
1) amplitude of vibration.
2) hertz
3) wood
4) wave
5 larnyx
6)spinal
7)the
Answer:
Explanation:
1.The intensity or loudness of a sound depends upon the extent to which the sounding body vibrates, i.e., the amplitude of vibration.
2.The number of periods or cycles per second is called frequency. The SI unit for frequency is the hertz (Hz).
3.Sound cannot travel through a vacuum. A vacuum is an area without any air, like space. So sound cannot travel through space because there is no matter for the vibrations to work in.
4.Shrillness of the sound produced by a body is determined by the frequency of the vibrating body.
5.The inner ear is found in all vertebrates, with substantial variations in form and function. The inner ear is innervated by the eighth cranial nerve in all vertebrates.
6.The molecules in the medium are tightly packed when the medium is dense, that implies the sound travels faster. Therefore, as the medium density increases, the speed of sound.
7.Under severe climatic conditions, selected roadside trees can form wind breaks and shelter belts to protect crops, and help to reduce climatic excesses and soil erosion. They can restore some ecological diversity to areas of agricultural monotony. They can be used by bees to produce honey and wax.