Question

arrange the following in the decreasing order of doped of sound .

a) steel < water < air
b) air < steel > water
c) steel > water > air
d) air > water > steel​

Answer 1

Answer:

option a..

steel < water < air..

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Answer 2

Required Answer:

${\underline {\boxed {\Large {\bf \gray { Option \: C!! } }}}}$

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Explanation:

Since the question says that we have to arrange them in decreasing order, so first of all we have point out the options in which "first part" or "last part" is solid.

This is because,

• In solid medium, sound travels fastest.

That happens because, molecules are closely packed in solids. So, sound energy is not wasted in transferring it to the successive molecules.

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Thus, we got the option

• a ) Steel < water < air
• c ) Steel > water > air
• d ) Air > water > steel

Option A:

• a ) Steel < water < air

→ It says that, in air sound will travel fastest. In water sound will be faster than steel and in steel the speed of sound will least fast.

This option is false, because sound travels fastest in solid. So sound will travel fastest in steel rather than water and air.

Option C:

• c ) Steel > water > air

→ It says that, in steel sound will travel fastest. In water sound will be faster than air and in air the speed of sound will least fast.

Thus, this option is correct.

Option D:

• d ) Air > water > steel

→ It says that, in air sound will travel fastest. In water sound will be faster than steel and in steel the speed of sound will least fast.

So, this option is also false.

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Remember that!

• Sound travels fastest in solids with the speed of approx. equal to 5960 m/s.

• Slower in liquids with speed of 1531 m/s.

• Slowest in air with the speed of 340 m/s.

• Sound doesn't travel in vaccum.

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