Which one of the following factors has no effect on the speed of sound in a gas?

Explanation

(A) Humidity: Humidity refers to the amount of moisture or water vapor present in the air. It does have an effect on the speed of sound. Generally, as humidity increases, the speed of sound in a gas decreases. This is because water vapor molecules in humid air can slow down the transmission of sound waves.(B) Pressure: Pressure is the force exerted by a gas per unit area. Interestingly, pressure does not have a direct effect on the speed of sound in a gas. Changes in pressure primarily affect the density of the gas, which indirectly influences the speed of sound.(C) Temperature: Temperature plays a significant role in determining the speed of sound in a gas. As the temperature increases, the speed of sound also increases. This is because higher temperatures cause gas molecules to move faster, leading to faster sound wave propagation.(D) Density: Density refers to the mass of a substance per unit volume. Density has a direct impact on the speed of sound in a gas. Generally, as the density of a gas increases, the speed of sound decreases. This is because denser gases have more molecules per unit volume, which can impede the transmission of sound waves.Out of these options, the correct answer is (B) pressure. Pressure does not directly affect the speed of sound in gas.