Question
Asked Jan 21, 2020
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If three molecules have velocities 0.5,1,2km/s respectively, calculate the ratio of the root mean square speed and average speed.

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Expert Answer

Step 1

Let the velocities of the three molecules be denoted as v1, v2 and v3.

Let the root mean square velocity of the three molecules be denoted as vrms and the average velocity of the three molecules be denoted as vav.

The root mean square speed is calculated as,

Physics homework question answer, step 1, image 1
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Step 2

Substitute 0.5 km/s for v1, 1 km/s for v2 and 2 km/s for v3 and solve for vrms as.

Physics homework question answer, step 2, image 1
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Step 3

The average speed is ...

Physics homework question answer, step 3, image 1
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Tagged in
SciencePhysics

Kinetic Theory of Gases

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