On Fri, Jun 26, 2009 at 10:48 PM, jsx_consultant < jsx-consult...@centrin.net.id> wrote: Jangan-jangan mbah dari T. Sipil nih..
Ini beneran, ada di wikipedia: http://en.wikipedia.org/wiki/Magdeburg_Water_Bridge Dia bilang menghubungi dua kanal the Elbe-Havel Canal<http://en.wikipedia.org/wiki/Elbe-Havel_Canal>and the Midland Canal <http://en.wikipedia.org/wiki/Mittellandkanal>. Saya sependapat tidak perlu hitung berat kapal, cuman maksimum water level aja, tambah safety factor mungkin 20 %. Berarti dua kanal tersebut tidak terhubung dengan sungai dibawahnya, karena berdasarkan prinsip "bejana berhubungan" tentunya level air akan sama, tidak mungkin berbeda seperti gambar, kecuali ada energi yang mempengaruhi (seperti pompa). Tapi logikanya, sungai ngalir ke laut, dan kanal terhubung ke laut. Kalo sama-sama terhubung kelaut, tentunya prinsip "bejana berhubungan berlaku. Kecuali kanalnya terhubung ke Danau yang terpisah dengan laut, kalo terpisah bagaimana cara kapal menuju laut, masa naik daratan..:D. Ada yang bisa jawab kebingungan saya?? Atau karana saya Tolol makanya bingung... piss ah.. Salam, ND --- In obrolan-bandar@yahoogroups.com <obrolan-bandar%40yahoogroups.com>, Saham Oke <wasi...@...> wrote: > ... > To those who appreciate engineering projects, here's a puzzle for you armchair > engineers and physicists. Did that bridge have to be designed to withstand > the additional weight of ship and barge traffic, or just the weight of > the water? > The civil engineer that design the bridge does NOT have to calculate the weight of the ship using the Archimedes law: - The weight of the ship will be EXACTLY equal to the water that is displaced by the floating ship. - The heavier the ship, the bigger will be the water that will be displaced by the ship, this displaced water will be EVENLY distributed to whole area of the river bridge. - So the engineer will ignore the weight of the ship and will use maximum height of water as the load of burden that must be withstand by the bridge... Any civil engineer here ?... > > > Lebih Bersih, Lebih Baik, Lebih Cepat - Rasakan Yahoo! Mail baru yang Lebih Cepat hari ini! http://id.mail.yahoo.com > >
