I tried to do this experiment recently at school and my house. I started the experiment by having three same type of bottles with the labels A,B and C. Bottle A has been fully filled with water, Bottle B has been half-filled with water and Bottle C is kept empty.
Then I started flipping the three bottles with the same number of tries. Then, I realized that
1) Bottle A and Bottle C will always flip more than 1 turn meaning more than 360 degree.
2) Bottle B will always flip less than 1 turn, meaning less than 360 degree (minimum 180 degree til maximum 270 degree).
So, my question is why it happens (with bottle B)? I think it is because of the quantity of water. But why?