Recent content by db725

Homework Statement A cross-section of a proposed excavation for a highway corridor is to be conducted in the proximity of a house built on shallow foundation. It is expected that the original groundwater table will drop to a permanent level as shown in the figure due to the excavation. (Please...

From my understanding the boundary layer determines the amount of bed shear stress? so it helps us with calculations. But I am not too sure why there needs to be one.

Thanks Studiot for your very detailed explanation, however we haven't been doing much on the quantitative side so I found it a bit hard to follow the formulas you have mentioned above as I don't have much background in it. Would there be a more qualitative way of going about this question. Would...

Hi all, I am currently studying civil hydraulics in my civil engineering course and we are going through estimating critical shear stresses for sediments. I am confused about the difference between boundary shear stress and particle shear stress. In terms of estimating critical shear stress...

Thanks very much for the suggestions, have been researching some other methods and I think this is the best one so far. I know it's a pain but would you mind further explaining '18m penetration would cantilever 12 m retained height but you obviously need to check. You could also go for a...

Hi Studiot, The basement wall types that I know of are : 1- contiguous piles ( bored of CFA) : piles almost touching 2- secant hard-soft piles (bored or CFA): piles overlapping 3- Diaphragm wall (d-wall) 4- Soldier pile walls I looked up all these wall types and seems like the...

Hi all, I am working a design project for a geotechnical engineering subject and it goes as follows: A 6 storey building requires a 12m deep basement comprising 3 levels of car park with plan dimensions of 50m by 50m and is to be constructed in a medium clay. The water table maximum level...

Thanks very much. Makes complete sense now

I forgot to add this last section to the question.. At the end of the mixing process, the container now transfers energy to its surroundings, and the entropy of the mixture is restored to its value before mixing began. State whether the combination of the mixing and energy transfer processes is...

Homework Statement An ideal engine operating on the Carnot cycle with a minimum temperature of 25°C develops 20 kW and rejects heat a rate of 12 kW. Calculate the maximum cycle temperature and the required heat supply of the cycle. Homework Equations Qhot/Thot =Qcold/Tcold...

Thanks LawrenceC, makes so much more sense now.

Thanks very much for the helpful explanation

Can you expand it a bit more, I haven't heard the term local entropy before so not entirely sure still

Homework Statement An open insulated vessel is divided into two parts by a vertical non-conducting partition.On one side of this partition is 2.5 kg of water initially at 38°C, and on the other side is 5.0 kg of water initially at a temperature of 70°C. On removal of the partition and the...

Homework Statement A gas is separated from vacuum by a membrane. Let the membrane rupture and the gas fill the entire volume. Neglecting any work associated with the rupturing of the membrane, is there work done in the process: a) If we take as our system the gas and the vacuum space b)...