Q. The speeds of 5 molecules of a gas (in arbitrary units) are as follows: $2,3,4,5,6.$ The root mean square speed for these molecules is
A) $2.91$
B) $3.52$
C) $4.00$
D) $4.24$
Explanation
(d) $v_{rms} = \sqrt{\frac{v_{1}^{2} + v_{2}^{2} + v_{3}^{2} + v_{4}^{2} + v_{5}^{2}}{5}} = 4.24$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.