- #1

Suraj M

Gold Member

- 599

- 39

## Homework Statement

imagine a planet with half the mass and half the radius of earth ..with temperature reaching 800K

k=1.38×10

^{-23}

mass of O₂ = 5.3×10

^{-26}

does the planet have O₂ or not?

## Homework Equations

½mv² = ½kT or ½mv² = kT or ½mv²= 3/2 kT

either only vertical or anything other than downward or average KE.....not sure..

## The Attempt at a Solution

½mv² = ½kT

» v ≈ 456 m/s

and v

_{e}= 11.2 km/s

so it shôuld have O₂and even if i take 2 or 3 degrees of freedom the planet will still have O₂

but the book and my teacher says that the planet does not have O₂ how??