u/i_like_surviving_yay

I'm in highschool and I have a mathematics project where we have to find a real life structure, that is governed by a specific principle of mathematics and develop a working model. Obviously almost every structure is based upon some basic foundational mathematics but we have to find something unique or interesting that is guided by a mathematical principle. This isn't really my expertise of knowledge so some ideas would be heavily appreciated!!

Like won't it grow back

I started dieting the day before yesterday, weighed everything I cooked and I'm supposed to be in a 250 calorie deficit, but I feel full and don't have a lot of cravings throughout the day? When I used to "diet" before(where i didn't really count calories just tried to eat less) I felt hungry all the time. Am i doing something wrong? Like is my weighing and counting maybe off? Or is this normal to experience

I'm learning about normal forces for the first time along with laws of motion. I wanted to ask, if a body(hypothetically)isn't compressible at all, will the normal forces not be there? And will tension not be there if a body is not expandable at all? If yes, then if we do take such a body and put it in contact with a block with mass, what will happen if we push on the hypothetical body? Will the block move or will it stay at rest?