4 ms·

i agree, I linked more for the similarity in experience between the gp and the author in regard their unlearning I prefer your clarifications when considering

i agree, I linked more for the similarity in experience between the gp and the author in regard their unlearning I prefer your clarifications when considering the function of capacitors That said, water does attract water.. the term used to describe the phenomena is cohesion https://en.m.wikipedia.org/wiki/Cohesion_(chemistry) https://en.m.wikipedia.org/wiki/Cohesion_(chemistry)

gohrt 10y ago
Cohesion is not an inverse-square field
- justifier 10y ago
  gp> because water does not attract other water in any way though i was merely addressing this quote your comment confuses me both in fillip and content from cohesion wiki(o): Water, for example, is strongly cohesive as each molecule may make four hydrogen bonds to other water molecules in a tetrahedral configuration. This results in a relatively strong Coulomb force between molecules. from coulomb force wiki(i): Coulomb's law or Coulomb's inverse-square law, is a law of physics that describes force interacting between static electrically charged particles. (o) https://en.wikipedia.org/wiki/Cohesion_(chemistry) https://en.wikipedia.org/wiki/Cohesion_(chemistry) (i) https://en.wikipedia.org/wiki/Coulomb%27s_law https://en.wikipedia.org/wiki/Coulomb%27s_law
  - seiferteric 10y ago
    Yes I knew water attracts water, but it is not relevant to the capacitor analogy. You might as well have said water attracts water via gravity, it's just not relevant in this situation.
    - dotancohen 10y ago
      Gravity does have an inverse-square attraction. Though obviously it is several orders magnitude less than electromagnetism, in fact the analogy holds.
seanp2k2 10y ago
What if the iron sphere contained an osmotic membrane?
- justifier 10y ago
  i think you could have some fun with this idea the op author likens voltage to pressure(o)(i) within the water analogy and your osmotic membrane(ii) functions as a sort of pressure responsive valve i'm sure there are some mental acrobatics to describe a capacitor's relationships: Q=CV; between charge(Q), capacitance(C), and pressure..er, voltage(V) using osmotic principles in place of the capacitance variable addressing the permittivity of the dialectric(iii) but you'd have to describe osmotic pressure while waving away incongruencies between the two concepts and i think you'd end up so deep into enervated analogies it would just be better to explain in direct language ;P (o) http://amasci.com/miscon/voltpres.html http://amasci.com/miscon/voltpres.html (i) http://amasci.com/miscon/voltage.html http://amasci.com/miscon/voltage.html (ii) https://en.wikipedia.org/wiki/Osmotic_pressure https://en.wikipedia.org/wiki/Osmotic_pressure (iii) https://en.wikipedia.org/wiki/Capacitance https://en.wikipedia.org/wiki/Capacitance
crador 10y ago
Don't forget about gravity as well. Interestingly, cohesion itself is caused by electric fields between water molecules due to their polarity (uneven distribution of charge, oxygen is electron-greedy). Much like a capacitor, separating the molecules (plates of the capacitor in the analogy) requires work which gets stored in the electric field between them.

gohrt 10y ago

Cohesion is not an inverse-square field

justifier 10y ago
gp> because water does not attract other water in any way though i was merely addressing this quote your comment confuses me both in fillip and content from cohesion wiki(o): Water, for example, is strongly cohesive as each molecule may make four hydrogen bonds to other water molecules in a tetrahedral configuration. This results in a relatively strong Coulomb force between molecules. from coulomb force wiki(i): Coulomb's law or Coulomb's inverse-square law, is a law of physics that describes force interacting between static electrically charged particles. (o) https://en.wikipedia.org/wiki/Cohesion_(chemistry) https://en.wikipedia.org/wiki/Cohesion_(chemistry) (i) https://en.wikipedia.org/wiki/Coulomb%27s_law https://en.wikipedia.org/wiki/Coulomb%27s_law
- seiferteric 10y ago
  Yes I knew water attracts water, but it is not relevant to the capacitor analogy. You might as well have said water attracts water via gravity, it's just not relevant in this situation.
  - dotancohen 10y ago
    Gravity does have an inverse-square attraction. Though obviously it is several orders magnitude less than electromagnetism, in fact the analogy holds.

seanp2k2 10y ago

What if the iron sphere contained an osmotic membrane?

justifier 10y ago
i think you could have some fun with this idea the op author likens voltage to pressure(o)(i) within the water analogy and your osmotic membrane(ii) functions as a sort of pressure responsive valve i'm sure there are some mental acrobatics to describe a capacitor's relationships: Q=CV; between charge(Q), capacitance(C), and pressure..er, voltage(V) using osmotic principles in place of the capacitance variable addressing the permittivity of the dialectric(iii) but you'd have to describe osmotic pressure while waving away incongruencies between the two concepts and i think you'd end up so deep into enervated analogies it would just be better to explain in direct language ;P (o) http://amasci.com/miscon/voltpres.html http://amasci.com/miscon/voltpres.html (i) http://amasci.com/miscon/voltage.html http://amasci.com/miscon/voltage.html (ii) https://en.wikipedia.org/wiki/Osmotic_pressure https://en.wikipedia.org/wiki/Osmotic_pressure (iii) https://en.wikipedia.org/wiki/Capacitance https://en.wikipedia.org/wiki/Capacitance

crador 10y ago

Don't forget about gravity as well. Interestingly, cohesion itself is caused by electric fields between water molecules due to their polarity (uneven distribution of charge, oxygen is electron-greedy). Much like a capacitor, separating the molecules (plates of the capacitor in the analogy) requires work which gets stored in the electric field between them.