Question

The mean square speed of 4 molecules of a gas having speeds 1, 2, 3 and 4 m/s is –

• A. 2.44 m/s
• B. 7.5 m/s
• C. 2.5 m/s
• D. 9 m/s

Answer 1

Answer: (B)

7.5 m/s

Answer 2

${\overline{V}}_{m}^{2} = \frac{(1)^{2} + (2)^{2} + (3)^{2} + (4)^{2}}{4}$