What is the speed of sound in air when the temperature is 20°c?
319 m/s
331 m/s
343 m/s
219 m/s

The speed of sound in air when the temperature is 20°C is 343 m/s.

Explanation:

Given that,

Temperature T = 20°C = 20+273=293 K

The speed of sound in air is the distance traveled divided by time.

We know that,

The relation between the speed of sound in air and temperature is defined as:

Where, T = temperature in Kelvin

v = speed of sound in air

We substitute the value into the formula

The speed of sound in air is 331 m/s at 0° C, 343 m/s at 20°C and 346 m/s at 25°C.

Hence, the speed of sound in air when the temperature is 20°C is 343 m/s.

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