Question

The average velocity of molecules of a gas of molecular weight M at temperature T is
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Answer 1

The root-mean-square speed measures the average speed of particles in a gas, defined as vrms=√3RTM v r m s = 3 R T M .

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Answer 2

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Molecules of gas have a random motion. Thus the velocity vectors cancel each other and the 'average velocity' of gas is zero.

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The average velocity of an object is its total displacement divided by the total time taken. In other words, it is the rate at which an object changes its position from one place to another. Average velocity is a vector quantity.

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