This question would have two parts:
1 - How to calculate thickness of a 1 square meter window made of acrylic in a submarine to endure 100meters of deepness in salt water?
I don't remember the procedure to calculate this, even If I have done it in the past during mechanical structure classes. So any help with the calculus, or from where to get the formulas, is appreciated.
2 - Roughly speaking, this is the same strength required for the material to endure the weight of a column of 100m tall and 1 square meter base of water? So, 100 Tons?