The speed of three particles is recorded as 3 m/s, 4 m/s, and 5 m/s. What is a root mean square speed of these particles?(a) 4.082 m/s(b) 2.07 m/s(c) 3.87 m/s(d) 3.082 m/sI have been asked this question in an online quiz.This interesting question is from States of Matter in portion States of Matter of Chemistry – Class 11

The speed of three particles is recorded as 3 m/s, 4 m/s, and 5 m/s. W

1.	The speed of three particles is recorded as 3 m/s, 4 m/s, and 5 m/s. What is a root mean square speed of these particles?(a) 4.082 m/s(b) 2.07 m/s(c) 3.87 m/s(d) 3.082 m/sI have been asked this question in an online quiz.This interesting question is from States of Matter in portion States of Matter of Chemistry – Class 11
Answer» Correct answer is (a) 4.082 m/s Best explanation: The root means SQUARE speed of particles is NOTHING but the square root over the SUM of squares of the particle’s speeds by a total NUMBER of particles. So by substituting, √3^2 + 4^2 + 5^2/3 = 4.082 m/s.

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