Question

18. Four molecules of a gas have speeds 1, 2, 3 and
4 km/s. The value of the root mean square speed of
the gas molecules is
​

Answer 1

v = [(v₁² + v₂² + v₃² + v₄²)/4]^0.5

v = [(1+4+9+16)/4] ^ 0.5 = √(7.5) km/s