Eli5: why does the viscosity of a liquid determine the amount of pressure it takes to blow bubbles in it and does the depth of the liquid relative to where the air is released also play a role? (Is it harder to blow bubbles In deeper water?)

Question

Eli5: why does the viscosity of a liquid determine the amount of pressure it takes to blow bubbles in it and does the depth of the liquid relative to where the air is released also play a role? (Is it harder to blow bubbles In deeper water?)

In: Mathematics

Answer 1

I can explain the depth part. It’s because of pressure of the liquid. The bubble in liquid (water for example), experience pressure of the water above it. So you basically try to create a bubble of pressurized air inside of the liquid. And creating big pressure is harder.