- #1
mr-tom
- 18
- 0
I'm trying to find the viscosity of some glycerol that we dropped various steel balls down using the equation:
V = [2r^2 (p – σ) g] / 9η
I put in these values:
p = 7800 kg m-3
σ = 1200 kg m-3
g = 9.8 m s-2
And ended up with the equation. η = 129360r^2 / 9V
My problem is that I thought viscosity is a constant. When I put my values in the viscosity decreases as radius decreases.
V = [2r^2 (p – σ) g] / 9η
I put in these values:
p = 7800 kg m-3
σ = 1200 kg m-3
g = 9.8 m s-2
And ended up with the equation. η = 129360r^2 / 9V
My problem is that I thought viscosity is a constant. When I put my values in the viscosity decreases as radius decreases.