1. The problem statement, all variables and given/known data 1. Why does the power requirement for a bioreactor increase when flooding ( when the cavities in the bioreactor hae merge together and beome large) occurs to the bioreactor? 2. Why is tip speed of the agitator related to having the highest shear force in a bioreactor? 2. Relevant equations not sure there are any as these are theory questions 3. The attempt at a solution All i know is that for 1. Shouldn't it have a lower power requirement since the agitators are practically spinning air and air much is less dense than liquid. 2. Really have no clue.