Question

fill in the blanks (a)sound does not travel through .......... (b)the velocity of sound in steel is ........ than the velocity of sand in water.

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Answer 1

Answer:

a.Vaccum

b.high

b.Sound is more faster ib hard solid and sand is not much harder than iron.

a.sound only travels in solid liquid and gas it can't travel in vaccum.

Answer 2

a) Vacuum

b) Faster

Explanation:

a) Sound waves are travelling vibrations of particles in media such as air, water or metal. So it stands to reason that they cannot travel through empty space, where there are no atoms or molecules to vibrate.

b) Speed of sound refers to the speed of sound waves travelling in air which is different in different mediums. It travels the slowest in gases, a little faster in liquids, and the fastest in solids. The higher the density of the medium, the faster will be the speed of sound and vice versa.

Hope it would be helpful :)