
Speed of sound in moist air is ___________ than speed of sound in dry air:
A) Less
B) Same as
C) More
D) Data insufficient
Answer
499.2k+ views
Hint: In order to solve this consider the pressure and temperature conditions. Always remember that the density of water vapour is less than the density of dry air at ordinary temperature. Remember the relation between the speed of sound in moist air and the speed of sound in dry air.
Complete step by step solution:
We know that the formula for the speed of sound in air is given by,
Where
is the pressure
is the density
As we already know that the density of water vapour is less than the density of dry air at ordinary temperatures and it is in the ratio .
Therefore, the presence of moisture in the air decreases the density of air and therefore increases the speed of sound in that moist air.
Hence, at a given temperature, the sound of air in moist air is more than the speed of sound in dry air.
Therefore, the correct option is (C).
Additional information:
The relation between the speed of sound in moist air and speed of sound in dry air is given by
Where is the speed of sound in dry air
is the speed of sound in moist air
is the saturation pressure of moisture at given temperature
is the pressure of the air
Note: The speed of sound in dry air is whereas the speed of sound in moist air is . Keep in mind that the water vapour is lighter than dry air. As we remove the moisture from air, then its density increases and the speed of sound in moist air is inversely proportional to the root of its density.
Complete step by step solution:
We know that the formula for the speed of sound in air is given by,
Where
As we already know that the density of water vapour is less than the density of dry air at ordinary temperatures and it is in the ratio
Therefore, the presence of moisture in the air decreases the density of air and therefore increases the speed of sound in that moist air.
Hence, at a given temperature, the sound of air in moist air is more than the speed of sound in dry air.
Therefore, the correct option is (C).
Additional information:
The relation between the speed of sound in moist air and speed of sound in dry air is given by
Where
Note: The speed of sound in dry air is
Recently Updated Pages
Master Class 12 Business Studies: Engaging Questions & Answers for Success

Master Class 12 English: Engaging Questions & Answers for Success

Master Class 12 Economics: Engaging Questions & Answers for Success

Master Class 12 Social Science: Engaging Questions & Answers for Success

Master Class 12 Maths: Engaging Questions & Answers for Success

Master Class 12 Chemistry: Engaging Questions & Answers for Success

Trending doubts
What is the Full Form of ISI and RAW

Difference Between Plant Cell and Animal Cell

Fill the blanks with the suitable prepositions 1 The class 9 english CBSE

Name the states which share their boundary with Indias class 9 social science CBSE

Name 10 Living and Non living things class 9 biology CBSE

Discuss what these phrases mean to you A a yellow wood class 9 english CBSE
