# Buoyancy correction

## Main Question or Discussion Point

Is this equation correct?
equation 1: mass=density(density-density)
Im asking this because in air correction we have equation 2: mass=density(density-density)/density(density-density) -----here we get mass.But get we mass still in this case?:mass=density(density-density)
Because I was trying to derive this using a dimension principle,but it doesn t fit in equation 1,because:m=kg/m3*kg/m3 which is kg2/m6 and this doesn t equal to mass.
Please try to explain me this by using dimension principle as well.
Thanks

Last edited:

haruspex
Homework Helper
Gold Member
Mass = density * volume. Why would you ever multiply densities?
If you are considering an 'air correction', it sounds like you're confusing mass with weight.

Thanks,I just want to know if mass=density(density-density) is correct,because as I said,mass has kg unit and right side of equation has kg2m6,so I think,that it is impossible.But I just want to ensure....Am i right?

haruspex