An increase in the pitch of the sound
An increase in the loudness of the sound
Wind travelling in the same direction of the sound
A change in the atmospheric pressure at constant temperature
Explanation
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The correct answer is:
C. Wind travelling in the same direction of the sound
Explanation:
The velocity of sound depends on the medium through which it travels. Factors affecting sound velocity include:
1. Medium's properties – Sound travels faster in solids, slower in liquids, and slowest in gases.
2. Temperature – In gases, higher temperatures increase the speed of sound.
3. Wind direction – Wind moving in the same direction as the sound wave increases its velocity, while wind in the opposite direction slows it down.
Now, analyzing the options:
A & B: Pitch and loudness affect perception, not velocity.
D: At constant temperature, atmospheric pressure does not affect sound speed because both pressure and density change proportionally, keeping the velocity unchanged.
Thus, C is the correct answer.
velocity= frequency*wavelength
pitch of sound depends on the frequency..
Increase in pitch increases the velocity thereby increasing the velocity of the sound!
A is the answer
