So does that not follow the same set of principles as we were talking about before then? I get that this is a little different in that an it's not an external current passing through an electrolyte solution...
I was expecting to see some kind of change in voltage potential based on the idea that saltwater is a better conductor than freshwater. If not those electrodes, what would you suggest? We tested several combinations and went with the ones that gave the highest values, which happened to be Mg...
Ok - with that in mind then, SHOULDN'T there be a change noticeable? I would think that between distilled water and nearly saturated water there would be something to see. There are noticeable trends up and down the pH scale with the rest of the data but I'm trying to focus on one variable at a...
Right - yeah I had that backwards in my head but it makes sense. Higher Ions = Higher Conductivity = Lower Voltage. That's fine on paper, but why would I be getting results consistently like what I posted in the last reply there?
To simplify my case, just look across a single pH so that only the concentration of NaCl is changing. Why would I not see a distinct trend in voltage potential as concentration increases (either up or down)? It's all over the map...
For example, across the pH 7.0 group I get the following...
Assuming it's related to resistance then in terms of how saltwater will have higher resistance because of the ions dissolved. Higher [ions] = Lower conductivity = Higher Voltage. Does that sound right?
So the first thing that jumps out at me there is that it refers to fresh water as "almost an insulator", which is what I have seen before. So, again, why are we getting higher voltages across fresh water that has no to few dissolved ions? What am I missing here?
I'll gladly read that, as I came here for help.
On another note, and I fully expect to be lectured on this as well, I come to this forum about once a year as an absolute last resort because of how quickly some of the members are to just say "no, you're wrong" and not even attempt to give...
We created a 5x5 seawater battery system to test voltages across multiple pHs and concentrations of NaCl. Concentration ranges go from 0g/L to 32g/L (near saturation) and the pHs range from 3 to 11. We used copper and magnesium electrodes to test the voltages in each cell and got some results we...
Yes, that should have read 20m, not 2m... my 0 key requires a little convincing sometimes...
Regarding the first part there, would v as a function of D be the v(X), v(Y), or v(Combined)?
Can you elaborate on "finding release speed as a function of D via conservation of energy considerations"?
I had somebody else suggest picturing this as a light box model and timing the shadow (i.e. the X-axis velocity) and going from there...which seems similar to what you're suggesting about...
Homework Statement
A 50m zipline is hung 11m off of the ground at its starting point (assume it ends at ground level). If you are to drop an object which is 20m along the ground from the start of the zipline, how far down the line would you need to let it go?
Homework Equations
d=((VF+VI)/2)*t...