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## Homework Statement

What is the ratio of the average speed of an atom of neon to another atom of neon at twice the temperature but the same pressure?

## Homework Equations

KE = 3/2 RT; v

_{1}/v

_{2}= sqrt. m

_{2}/sqrt. m

_{1}

## The Attempt at a Solution

I first used KE = 3/2RT and substituted 1 and 2 for T and set them equal to each other. I ended up with a ratio of 1:2. Why is the answer 1:1.4?