Quizzes & Puzzles3 mins ago
Answers
1 to 6 of 6
Best Answer
No best answer has yet been selected by margssmith. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.
... and subtract the mass of the bedload, the mass of the suspended load, and the friction of the river bed, (this being proportional to the width of the river and the co-efficient of friction, which itself is determined by the nature of the river bed ie rock, sand mud etc.)
All put together, you have a whole load of variables and a pointless question.
My turn My turn
From my MKS hydrodynamics course the density of water is 100 000 kg m-3. A cubic metre cant be 1 kg, just think of a litre.
Its either ten to the four or ten to the five
although what trilobite says is absolutely true, this difficulty does not make engineers - boring little b*stards at the best of times - give up.
They just approximate. Google Chezy and you;ll see what I mean. Chexy equations are used in open channel flow and are not that big a deal.
howver that is not the question - the q mentions energy used in transportation and not river flow energies.
In other words if you had a barge of 10 metric tonnes what energy would be reqd to yank it up stream 100 km againt a flow of 0.1 m/s?
Interesting q., Marge
Are there any engineers out there?
1 to 6 of 6
