leonardo da vinci : the codex leicester

what must an especially strong dam look like?

at regular intervals one should set a wide stone into the dam and anchor it with chains. these stones should be longer than all others and should be wider towards the top of the dam than below. the stones are located on top of the dam’s piles and are set into the pile there and anchored to the rest of the dam by iron struts. in this way the dam has its own support frame.

moving

1. why does something move?
2. how can flowing water consume its momentum when it encounters an obstruction?
3. why are the waves of descending rivers slower than the water flow of the river itself?
4. why does a body move when something strikes it?
5. under what conditions can a person on a see-saw not jump up?
6. why does waves look like crescents when viewed from the side?
7. what happens to the waves when water crashed into an obstacle?
8. what effects do the slope of the obstruction and the angle of impact have?
9. why doesn't viscous water flow continually throungh a bent pipe?
10. does the weight of water vary according to how one changes the slope of a pipe filled with water?
11. how can one see that movement separates from its cause?
12. where does the wave break?
13. what causes cyclones?
14. can a special dam influence the impact of the water?
15. what must an especially strong dam look like?
16. how can one simulate the collapse of a wave?
17. how does air, once it is immersed, escape the water?
18. what machine can be used to ram piles into the ground?