[" The Temperature at which the root mean square speed of a atom in an organ gas cylinder "],[" equal to the rms speed of a helium gas at "-20^(@)C" ,(atoms mass of "A_(r)=40u" of "He=4u)]

At what temperature is the root mean square speed of an atom in an argon gas cylinder equal to the rms speed of a helium gas atom at -20^(@)C ? (atomic mass of Ar = 39.9 u, of He = 4.0 u) .

At what temperature is the root mean square speed of an atom in an argon gas cylinder equal to the rms speed of a helium gas atom at - 20 ^(@)C ? (atomic mass of Ar = 39.9 u, of He = 4.0 u).

At what temperature is the root mean square speed of a an atom is an argon gas cylinder equal to the rms speed of helium gas at - 20^(@)C ? (atomic mass of Ar = 39.9 u and of He = 4.0u)

At what temperature is the root mean square speed of an atom in an argon gas cylinder equal to the rmsspeed of a helium gas atom at -20 ^@C ? (atomic mass of Ar = 39.9 u, of He = 4.0 u).

At what temperature is the root mean square speed of an atom in an argon gas cylinder equal to the r.m.s. speed of a helium gas atom at -20^(@) C ? (Atomic mass of Ar = 39.9 u, of He = 4.0 u).

At what temperature is the root mean square speed of an atom in an argon gas cylinder equal to the r.m.s. speed of a helium gas atom at -20^(@) C ? (Atomic mass of Ar = 39.9 u, of He = 4.0 u).