Question

In which of the following materials the speed of sound is highest?
A) Glycerine
B) Hydrogen
C) Lead
D) Iron

Answer 1

Hint: Sound and music are portions of our ordinary hearing experience. We rarely set aside the effort to consider the qualities and practices of sound and the components by which sound is created, propagated and detected, the reason for a comprehension of sound, music and hearing is the material science of waves. Sound is a wave that is made by vibrating objects and engendered through a medium starting with one area then onto the next. In this unit, we will examine the nature, properties and practices of sound waves and apply essential wave standards towards a comprehension of music.

Complete step by step answer:
A sound wave is comparative in nature to a smooth wave for an assortment of reasons. To begin with, there is a medium that conveys the unsettling influences starting with one area then onto the next. Regularly, this medium is air, however it could be any material for example water or steel. The medium is essentially a progression of interconnected and communicating particles. Second, there is a unique wellspring of a wave. Some vibrating object equipped for up settling the main molecules of the medium.
The unsettling influences could be made by the vibrating vocal lines of an individual, the vibrating string and soundboard of a guitar or violin, the vibrating prongs, of a tuning fork, or the vibrating stomach of a radio speaker. Third, the sound wave is shipped starting with one area then onto the next by methods for molecule to molecule connection. On the off chance that the sound wave is travelling through air, at that point as one air molecule is uprooted from its harmony position, it closes neighbours, making them be dislodged from their balance position.
Hence the velocity depends only on the medium that means the greater the density of medium, greater the speed of sound.
In the given option, glycerine is liquid, hydrogen is gas, lead and iron are solid but iron is denser than lead.

Therefore, the velocity of sound is greatest in iron. Hence option D is correct.

Note:
The standard value of speed of sound in air is \[332m/s\] which is proved by Newton and corrected by Laplace. But this value varies with different densities. If the medium is denser than other given medium then the speed is greater in denser medium. Mostly, all solids have higher density than liquids and gases.