- #1
buttermellow
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Homework Statement
An oxygen atom is four times as massive as a helium atom. In an experiment, a helium atom and an oxygen atom have the same kinetic energy. What is the ratio vHe /vO of their speeds?
Homework Equations
K=.5mv2
The Attempt at a Solution
.5mHe(vHe)2=.5(4mHe)(vO)2
I'm not sure what to do with that though, how to solve for the ratio.