Question

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

Answer 1

The answer to your question is 343 m/s

Answer 2

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

Step-by-step 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:

`v= 331\sqrt{(T)/(273)}`

Where, T = temperature in Kelvin

v = speed of sound in air

We substitute the value into the formula

`v = 331\sqrt{(293)/(273)}`

`v = 342.9 = 343\ m/s`

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.