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Why is velocity of sound in gases independent of pressure?
The velocity of sound in gases varies depending on several factors such as temperature, pressure, and composition of the gas. However, at room temperature and pressure, the approximate velocity of sound in dry air is 343 meters per second.
The velocity of sound in gases increases with an increase in temperature. This is because at higher temperatures, the molecules in the gas have more kinetic energy and can vibrate faster, leading to a higher velocity of sound.
The velocity of sound in gases is influenced by the molecular weight and density of the gas. Heavier gases, such as carbon dioxide, have a lower velocity of sound compared to lighter gases, such as helium.
Yes, the velocity of sound decreases with an increase in altitude. This is because at higher altitudes, the air is less dense, and sound waves travel through it with less resistance, resulting in a lower velocity.
The velocity of sound in gases can be measured using a variety of methods, such as the resonant tube method, Kundt's tube method, and the time-of-flight method. These methods involve creating sound waves in a controlled environment and measuring the time it takes for the waves to travel a known distance.