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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?

(A) 1:1

(B) 1:1.4

(C) 1:2

(D) 1:4

## Homework Equations

KE = 3/2RT

## The Attempt at a Solution

I used the above equation and substituted 2 for T for twice the temperature and 1 for half of that:

KE=3/2RT = 3R

KE=3/2RT = 3/2R

My ratio is 3:1.5. The correct answer is B. So kinetic energy is proportional to temperature, but what is the relationship between speed and kinetic energy?