Question: Would a helium balloon rise faster in air or in water?

Vassilis Sideropoulos answered on 14 Mar 2019:

If the balloon didn’t pop due to the sheer pressure underwater, perhaps it would have been faster in water… Yet, this question can’t be really answer as it is a complicated problem and the answer can change easily – you have to consider different things such as temperature, pressure, and salinity because these factors change density and thus the results!