fish and water?
This kind of question is really interisting, mainly because it is not acuratelly presented, the answers depends of a lot of variables, so, who dares give the answer, can be trapped by the question...why ? let's see...
1- What is the size of the fishes, do they both of them have the same size and weight?
2- Will water transbord when you put the fishes?
3- If the alive fish move enough, will the water in its glass get out the glass due its moviment ?
4-How long is the observation time of the experiment ?
5- if its zero you will have an answer, if its infinite and the alive fish has the everlasting life you will have another answer.
6 -If its long enough and you dont feed the alive fish, soon you will have two dead fishes.
The question will be more interesting if it turns out in proposing other milions variables to consider. Funny isn't it ?