1. The problem statement, all variables and given/known data Any theories about this: I was given a lab experience where I had 6 test tubes each with a different weight and I had to time the time it took to get through a 1L cylinder full of water. Here is the problem: my data 3 times out of 6, they all took roughly the same time to fall(±0.03 sec) 1 out of 6, the heavier the weight, the slower they fell 2 times out of 6, the heavier the weight, the faster the fall I am supposed to find a relation between the speed in water and the weight. 2. Relevant equations speed = distance/time 3. The attempt at a solution Since it's impossible for a heavier weight to be slower than a lighter weight, I rule out that data. I think that water offers more resistance than air to speed so my weight would be falling slower in water than in the air. Since these are real world tests, I don't really need to calculate anything. I just need to find the relation between speed in water and weight, with the theories related to the relation. Maybe some equations, if possible. Thanks.