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Searching for questions in category mechanics

Found 29 questions. Showing results 1 to 5.

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1.	Hi! Hope you guys are having a great day! I have a question involving a recent experiment that I performed: What I wanted to do was to see if I could contain water using capillary forces, etc. in a "hollow, rectangular tube" (imagine a regular straw, but then making it into a square- shaped straw, and then elongating two of the sides of that square that are parrallel to each other to create a rectangular-shaped "straw") Anyway, I wasnt able to make the shape perfect due to the materials that I was using to create the shape. But it did seem to work fairly well, althought water did begin to slowly fall out of the tube when it was in the vertical position due to some air bubbles that I thought might of formed when I was taking the entire tube out of the water. The dimensions of the rectangular part of the tube were 0.5cm by about 1in or so, so I dont think the tube was big enought to prevent the capillary forces from keeping the water in. Do you guys have any idea why the water might be dripping out of the tube? Would you guys suggest making the tube more water/air tight or making a perfect recangular shape to prevent trapping air bubbles? Or maybe making it smaller? Any info will help. Thank you guys so much!
2.	What geometrical shapes create structures that are both strong and light?
3.	How could you know when a Tsunami is coming, how could you detect it when it could be days away or maybe hours?
4.	Hi! I have a question involving some mechanical background. I was wondering where I could get a sort of "circular railing" mechanism. To go into more detail, there would be a rotating cylinder inside of a stationary outer circular part, with some sort of railing mechanism that would allow the cylinder to rotate inside of the circular part. The dimension would be decently large, the rotating cylinder would probably have a diameter of about 12-15 inches. Any info on some sort of "circular railing" mechanisms would be helpful, even something I could make myself. Thanks for your help.
5.	Hi! I hope you are having a happy new year! How can I calculate how much force (in newtons) a 1/2 in and 1 in thick steel (preferably stainless steel) can take? Thanks for your help!