Cell Definition and 899 Threads

The problem is: 1. Assume ONE BOX W*W*H1 filled with a dielectric material with dielectric constant eprs. The vertical walls are assigned periodic boundary conditions and the other two faces are Floquet Ports (One TE mode and one TM mode). 2. Assume a transmission line that is L1 long with a...

I'm doing a 3S3P pack. My box can hold 9 18650s. It can also hold 3 18650s and 6 21700s. Is it ok to mix 18650s and 21700s in the same p pack? I would use the same 21700s and the same 18650s in each p pack. I would arrange them to maximize capacity. So say 18650 cells are Model A cells (making...

So here you can see the basics behind a thermocouple. What people usually do, is that they connect these junctions electrically in series and thermally in parallel. Now another thing people do is cascading several peltier modules. Now my thought was, why not connect them electrically...

Questions regarding Primitive Unit Cell (and what I think the answer are, correct me if I am wrong) 1. Can there be more than one Primitive Unit cells for the same crystal? yes, Wigner Seitz cell always will exist. There can be other primitive Unit cells along with Wigner Seitz too. But...

Hi everyone, I'd like to track and write a source file (via SSW card) with the particles entering a specific cell which has been defined employing the TRCL card. So the "original" cell is a cylinder defined at the origin but the cell I'm interested in is translated along the z-axis. I've...

The quantity (dE_dP)_T can be derived using the Gibbs-Helmholtz equation which states that dE = TdS - PdV + μdN where E is the internal energy of the system, S is the entropy, V is the volume, N is the number of particles and μ is the chemical potential. Differentiating this equation with...

Hello, What is the voltage of a voltaic cell? Some sources claim it's 1.1 V (the difference of potentials of zinc and copper). But I've also seen its being claimed to be 0.76 V (the difference of potentials of zinc and hydrogen). I know that zinc and hydrogen are the ones undergoing redox...

Hey everyone. Let's say you have a tall tree. say, 10 m tall. Take a cubic cell 1mm in dimensions. Suppose the cell is at 1 m high in the center of the trunk of the tree. What are the forces acting on the cell? let's say tree cell's mass is t grams. its weight is F= ma = t (9.8) = 9.8 t...

Can someone explain me what does the underlined part of the following passage mean? "The reversible operation of a fuel cell implies that the external circuit exactly balances its emf, with the result that its current output is negligible. In actual operation under reasonable load, internal...

Hi everyone, My plan is defining a surface source on a cylindrical object (cylindrical surface+top end+bottom end) and I am interested in what happens outside the cylindrical body. To avoid distortions of particles starting on the surface, directed inwards and emerging on the other side of the...

Hi everyone, I am struggling to understand whether the results of FMESH tallies are already divided by the cell volume or not. I'd actually expect so considering: 1. the comparison with an F4 tally in the same cell where results are comparable only if I assume that the mesh tallies results are...

I would like to weigh our pet parakeets. They are rather skittish, so the idea I came up with was to hack a digital scale so as to put the controls and display some distance from the scale. Then I would add a perch to the scale. When one of our birds lands on the scale, I could turn on the...

Hey guys, I got an XRD data for my sample and want to determine its density. This requires finding lattice parameters. However, I'm not certain about the crystallographic system of my sample. How can I determine the type of the unit cell my sample has from XRD data (I can use GSAS II if...

Hi everybody, I'm struggling with some solid state physics topics. I am dealing with the Carbon diamond crystal structure, which is basically made of 2 FCC compenetrated. I really cannot visualize the Wigner–Seitz cell of this structure, is it possible to do it? I was thinking about visualizing...

At the Fall SCAAPT meeting, I learned about a free cell phone app, phyphox, which allows users to collect various types of data using their phones' sensors. I downloaded it, but I haven't looked into it very much yet. I just thought I'd mention it since others might find it useful or just fun to...

Hi all, I'd like to make an home-built OD600 sensor for measurement of cell concentration in suspension by Optical Density. There are several spectrophotometers in the market, indeed quite expensive, so I am interested in realizing a cheap device with standard components. Here's an example on...

Hi, I am trying to get to an answer for the following scenario. Imagine you have an electrochemical cell in its most basic terms. On the negative electrode you have 3 moles of iron metal in a chloride solution. On the positive side you have 3 moles FeCl3 solution. These are separated by a...

I have created a table which has some equations in it. The LaTeX code is as follows: \documentclass[a4paper,12pt]{article} \usepackage{mathtools} \usepackage{physics} \usepackage{tabularx} \usepackage{makecell} \newcommand{\tev}{\ensuremath{\mathcal{U}}}...

In the paper C. S. Lent and P. D. Tougaw, "A device architecture for computing with quantum dots," in Proceedings of the IEEE, vol. 85, no. 4, pp. 541-557, April 1997, doi: 10.1109/5.573 about quantum dots, it is stated that the basis vectors in the space of quantum states for a single cell...

At first I tried plugging everything in with 60Hz in the numerator but that did not work. I was told to think about sinusoidal waves and derivates but I'm not sure how that works. Any ideas? Thanks a lot

Homework Statement:: I go back to the line to finish the previous line in MCNP cell card but I had the error message shown in the photo. Please make a solution to my problem Relevant Equations:: c ********************* BLOCK 1: cartes des cellules **************** 1 2 -1.184 -40 #3 #19 #18...

I was watching this video that I found on Youtube. My question is, does type of electrolyte affect the voltage reading, since it dictates which redox reactions are possible? (here, Na2SO4 instread of CuSO4) Consider a Mg|Cu electrode pair in a galvanic cell; the reaction is, usually in...

I know WS cell only contains one lattice point, so we would have to trace bisectors, and obtain some kind of irregular shape. Anyways, I wanted to check if what I did is okay. It is considering a fictitious point as the center of the (non-primitive) unit cell, which would be one of those...

I have held the assumption that batteries supply electrons at the negative terminal and absorb electrons at the positive end for many years. However, after watching this video at about 3:30, it is said that batteries do not actually supply charged particles but that the battery only creates an...

When watching movies from like the 1980's/90's, it seems there was a way that police or someone with the right equipment could scan the air and intercept/listen to phone calls. I don't know if that was a movie thing that was fictional, but if it's true, does that technology/ability still...

My solution in shown on the attached files. The overall reaction between Mn02 is 0.81 Volts The overall reaction which shows the reformation of the MnO2 catalyst is .27 Volts. The first reaction is more positive which shows that the MnO2 can work as a catalyst.

In the circuit equivalent of a solar cell, shunt resistor is described as "The irregular polycrystalline lattice grain boundaries that resist to the flow of electrical current in the silicon material." If this explanation is correct, shouldn't it be "lower shunt resistance increases the current...

I have tried looking up online with the photoelectric effect, it just mentioned the energy of the photon must have to equal to band-gap energy. Yet, it didn't mention if 100% can be reached in that case, or if a single bandgap makes any effect...

Hi, I am an old man fascinated with quantum physics and its potential to change biology. I want to know if there had been any work being done to create an artificial cell that can self replicate. I guess the first step is to know the exact particle-level compositions of everything in a...

One of the most fundamental equations in chemical thermodynamics states: $$ \Delta_rH_m^⦵ = \Delta_rG_m^⦵ + T \Delta_rS_m^⦵ $$ If we look at this equation in context of net chemical reaction in electrolytic or galvanic cell, it is usually interpreted as follows: Enthalpy of reaction denotes...

The structure of the cell membrane is depicted as being formed from a bilayer of phospholipids with their hydrophilic portions pointing outwards and their hydrophilic portions facing each other. But as I look at the histology of the epithelial layer of the epidermis or mucous membranes, I am...

I am looking at modeling a PV cell and I'm trying to understand the real difference between the single diode and double diode mode. I now realize that I don't fully understand the purpose of the diode in the model in the first place. I've just learned that it was there and went with it. I...

Hi all, I am having trouble getting repeatable results from a linear regression formula that simply uses temperature vs load cell output especially with rapidly increasing/decreasing temperatures. This appears to be a result of the thermal co-efficient of our temperature sensor being almost...

First of all, I don't think the question was clear enough. Therefore, I had to assume they are referring to the volume of the unit cell. V=a^3, side length a aBCC=2R√2, aFCC=4√3/3R %change=(VFCC-VBCC)/VBCC I thought this was right until I checked with others who did this: so the only...

Hello All: i saw some youtube videos on testing IR controllers on normal with no add ons Cell phone camera and the cell phone screen is showing signal emitted by the IR LED of the remote controller , how the cell phone camera sensor are able to register a signal from an IR LED , the pixle in...

If the Hadley cell, which goes all the way around Earth, causes the the Sahara, surely the desert zone should likewise go all the way around the Earth, and there should be a mirror image of it in the Southern Hemisphere, shouldn't there?

I don't understand the ratio [ 1 g / 6.02*10^23 amu] in the following conversion factor: [228.2 amu / 4.75*10^(-23) cm3] * [ 1 g / 6.02*10^23 amu] = 7.98 g/cm3 (This calculation is in a problem where you're finding the density of a unit cell in g/cm3 - though it has nothing to do with the...

If I wanted to create a factory, possibly automated, on the moon using materials from the surface to create silicon solar cells how hard would it be? Considering the environment, the cheapest and simplest solar cell, regardless of efficiency, would be what to use because quantity and area of...

I'm modelling the interiors of core-dominated (exo)planets. The EoS I use in my calculations are mostly either a Birch-Murnaghan formulation or a Mie-Grüneisen-Debye formulation. In either case, the ambient density ρ0 at ambient pressure and temperature are required for the implementation...

Summary:: What does this mean? Discussion changed to meaning of words - moved from Biology When a channel in a plasma membrane (or really anything else in everyday life) is "open to the outside" of the membrane (or wall), what does that mean? Does that mean if you're standing outside of it then...

I have it as "located: embedded in the ER membrane" in my notes. Is this correct? Below is the image I use in my studies. Is this the only place in the cell where this enzyme is located? Is there a website that I can use to find the locations of enzymes in cells? Specifically: the human body...

Why is it that the d-spacing of the (100) plane is not equal to the lattice cell dimension a. I can calculate the (010) and (001) d-spacings and they are equal to b & c lattic cell dimensions which is what I expected. Small bit of background. My task was to write a small program that calculates...

If we put zinc rod in CuSO₄ solution it seems very obvious that they zinc and Cu²⁺ can interact and electrons can be pulled and pushed and one can grab electron and one can loose but in case of voltaic cell it seems magical that they are interacting and I tried to find its answer and I unable to...

Hello all- I am trying to design a simple cell phone holder that will be printed using a 3D printer. For this phone holder I would like the base to be the minimum length possible to avoid the thing tipping over backwards. I drew a simplified slope and base which represents the phone on the...

The above image (source) is pretty much the only thing we're told about how the MAPK pathway is activated. However, in passing, FAK was mentioned. We were told that focal adhesion integrins activate FAK which then activates the MAPK pathway. Seen in the image (source) below However the two...

hi guys for a solar cell i know that the fill factor is given by the following relation : $$ FF = \frac{Vm*Im}{Voc*Isc}$$ but when solving the following example : the book used the following relation in the problem?! : where this Ln relation came from ?

How do I get the wave dispersion for a 2D continuum unit cell subjected to a periodic boundary which is excited longitudinally? I'll be applying forces in ABAQUS with varying frequencies. I have come across Blochs theorem but I can't find any application of it in continuous systems. Every...

It is common knowledge that cells in our body regenerate. Every cell, except perhaps neurons, has a definite life-span. When cells die due to programmed cell death like apoptosis it is welcomed as cells are understood to be regenerating itself. If so why do we have to worry about inflammatory...

The EMF of the cell is the potential of the cathode subtract that of the anode, consistent with ##\Delta G = -nF\varepsilon##. If the cell is running as a galvanic cell/discharging, the EMF should be positive. If it is charging, the cathode (the one gaining electrons) is now negative and at...