Suppose you measured v, ( the x-component of the velocity ) of every atom in a one-litre can of helium gas (he), kept in equilibrium at 300 k and at atmospheric

Suppose you measured v, ( the x-component of the velocity ) of every atom in a one-litre can of helium gas (He), kept in equilibrium at 300 K and at atmospheric pressure, at a particular in- stant of time. The standard deviation -() in the measurement is approxi- mately equal to (a) 450 m/s (C) 1400 m/s (c) 14000 m/s |JNU 2014] (b) 1120 m/s (d) 800 m/s