प्रायिकतम वेग (most probable speed, `u_(MP)`) औसत चाल (average speed, `u_(AV)`) तथा वर्ग माध्य वेग `(u_(rms))` में निम्नलिखित अनुपात होता है :

What is average speed (barc or u_(av)) ?

Most probable speed, c_(mp) , average speed, c_(av) and root mean square speed c_(rms) of gas molecules are related as

The ratio between the three speeds, u_(mp) : u_(av) : u_(rms) is given as

Which of the following relationships is valid for the root mean square speed (u_("rms")) , average speed (u_(av)) , and the most probable speed (u_("mp")) ?

For gas at a temperature T the root-mean-square speed v_(rms) , the most probable speed v_(mp) , and the average speed v_(av) obey the relationship

For gas at a temperature T the root-mean-square speed v_(rms) , the most probable speed v_(mp) , and the average speed v_(av) obey the relationship

For a gas at a temperature T the Root mean square velocity v_(rms) ,the most probable speed v_(mp) ,and the average speed a_(av) obey the relationship