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Jul
18
comment Ping-pong ball pontoon
unfortunately, the doc is now available as paid - e.g. from here sciencedirect.com/science/article/pii/S0734743X07001832 :(
Jul
18
comment Ping-pong ball pontoon
Partially true. But the it is a function of diameter too. Imagine only an "one-ball" diameter, so balls are as "ooooooo" (vertically) down to water. For enough weight the ball column can reach 30m depth, and this depth the balls crunched by water pressure itself, so, therefore one of the limitation factors are - not possible to have bigger depth as 30m. (upvoting anyway - as only answer - but not fully accept this)
Feb
2
comment Ping-pong ball pontoon
For the above link - the sever is closed now - i'm not able get the doc too. :(
Jan
31
comment Calculation of the maximum load to the bar
Thanx. By your equations I found: clag.org.uk/beam.html and engineeringtoolbox.com/beam-stress-deflection-d_1312.html and several others helpful articles.
Jan
31
comment What objective criteria distinguish between valid science, fringe science and pseudoscience in physics?
yes, it is confirmed by observations - but, not fully explained (yet). In the past, lightning was confirmed by observations - as god's anger... :) BTW, I don't want start any flame-war about any phenomenology-science acceptance. Simply saying than any theory (good or bad) need power to be accepted.
Jan
31
comment Calculation of the maximum load to the bar
Exactly for what i looking. Thanx a lot! :)
Nov
12
comment Ping-pong ball pontoon
Sure - the "most precise" method will be experimentally test it in real... :) :)
Nov
12
comment Ping-pong ball pontoon
just found this 124.42.15.59/ck/2011-05/165/053/860/957/… - i hope it will help me getting the answer ;)
Nov
12
comment Ping-pong ball pontoon
Hm.. so.. probably the question is how much force can withstand the ball by contact-point forces... Is here a difference when the balls will be aligned in row (like vertical "oooooo" - 2 contact points only)? Any idea how to (approx) calculate the crushing force?
Nov
12
comment Ping-pong ball pontoon
Not a homework, just thinking about variable buoyancy pontoon what will have a constant height above water level depending on weight. And are your'e sure about the topmost row? Because at some depth the balls must withstand the pressure of the water PLUS the pressure (forces) what are transferred via the contact points... (edited poping -> crunching - thx for the suggestion)
Jul
29
comment How to calculate the highest theoretical artificial hill?
I asked about the "soil" because i not want asking about the engeneering (buildings), but making a hill from "natural materials" like soils, sand, rocks and so on...
Jul
29
comment How to calculate the highest theoretical artificial hill?
@dmckee - yes, becase it is importatnt for "setting" the base of the hill height. From the above link, the highest possible hill is 49km high, but the question is - where is its "base"? (it is not the sea level).
Jul
29
comment How to calculate the highest theoretical artificial hill?
Yesss! The link is exactly for what I'm looking. Thanx. ;) (Only don't understand the 4.9km result - because in the earth Everest is 8+Km - but will study the article more deeply.. (4.9x10**4m is 49km)