Electrical resistivity methodology

AI Thread Summary
The discussion centers on the request for a methodology to conduct lab tests on electrical resistivity, porosity, saturation index, and salinity of soil. Participants emphasize that the forum is not a platform for completing school assignments and encourage using online resources like Google and Wikipedia for research. They stress the importance of designing the experiment independently rather than seeking direct answers. Specific questions about experimental design can be posed once initial efforts have been made. Overall, the thread highlights the need for self-research and problem-solving in academic work.
star87jin
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Homework Statement



anyone can give me the methodology to do the lab test about the electrical resistivity, porosity, saturation index and salinity of soil

Homework Equations





The Attempt at a Solution

 
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star87jin said:

Homework Statement



anyone can give me the methodology to do the lab test about the electrical resistivity, porosity, saturation index and salinity of soil

Homework Equations





The Attempt at a Solution


What do you know so far? We do not do your school projects for you here at the PF.
 


that is my project title...but i can't search any methodology related to the saturation index and salinity of saturating solution of soil...
pls help me...
 


star87jin said:
that is my project title...but i can't search any methodology related to the saturation index and salinity of saturating solution of soil...
pls help me...

When you are told to design an experiment, and that you may use the Internet as a resource to help you, they do not mean for you to go to a web forum and have your assignment done for you. They mean for you to use Google, wikipedia, Wolfram Alpha, and other research tools, and for you to then design the experiment yourself.

We will not do your work for you here. If you are having a specific problem or question in your design of the experiment ("how do I avoid contaminating my sample as I do this set of steps...?"), then the PF is an appropriate place to ask that question (after you have posted all of your work so far).

I googled lab experiment methodology, and got bzillions of hits. Here's the first one -- it's pretty good, and should get you going quite well:

http://en.wikipedia.org/wiki/Experiment

.
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
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