Calcula la velocidad del sonido en el aire a 40ºC(313ºK) y una atmosfera de presión (masa molecular del aire M=0,0288kg/mol)

355.66 m/s

Explanation:

Since sound is a mechanical wave, its speed varies with the medium and its properties, such as its temperature.

So, if we want to calculate the speed of sound in air at we can use the following equation that relates with the temperature:

(1)

Where:

is the Heat capacity ratio for air

is the Universal Gas constant  

is the air temperature in Kelvin

is the air molar mass

(2)

Finally:

This is the speed of sound at 313 K

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach