Diagram Definition and 1000 Threads

see this diagram of the structure of diamond given in my textbook- I have read in my textbook that each carbon atom in a Diamond crystal is attached to four other carbon atoms by strong covalent bonds.But, in the diagram above I can see that some of the carbon atoms are not attached to 4...

I need some help in checking my work, especially #4. Problem: You have a set of 10 cards numbered 1-10. You choose a card at random. Event A is choosing a number less than 8. Event B is choosing an even number. Draw a Venn Diagram and calculate each of the following probabilities: 1) P(A)...

Homework Statement [/B]Homework Equations [/B] I = G * U The Attempt at a Solution [/B] Hello, i know the solution is 5.0 A/V but i don't know if my way of solving this was correct. I rearranged it to G= I/U and solved this equation for all the values in the table and then added them...

Homework Statement Please look at the screenshot attached. The answer is "Yes", but I am not sure why. Homework Equations N/A The Attempt at a Solution Oxygen have six electrons, but the energy diagram shows only five. That was why I thought it was wrong, but the diagram shown is correct...

Homework Statement Homework Equations To find Ca / Rb we take Ra = 0 --- is this right? I used mason's formula P1 = -G2 G1 H1 Loop = G1, G2, -H1, -H2 Using Mason's Gain we get: Delta1 = 1 Delta = 1 - G1G2H1H2 Using Mason's Gain TF = -G1G2H1 Divided by ( 1 - G1G2H1H2) But substituting the...

Hello, I recently watched a video as an introduction to Feynman diagrams for my own self-interest. The video gave a link to practice problems, and one of them was as follows: In a neutron star gravitational collapse causes valence electrons to combine with protons. Draw a Feynman diagram...

Hello, All substances that are either in the liquid or solid state have a small vapor pressure which implies that they are always slowly (solids especially) evaporating and turning into a gas (vapor). The phase diagrams of water and carbon dioxide indicate only states (P , V) of pressure and...

Homework Statement This isn't a problem. I need help understanding a diagram and graphs from my book Homework EquationsThe Attempt at a Solution So I'm given a diagram on an AC circuit and a resistor. I am then given a graph of the potential of the resistor as a function of time, and then a...

I am currently performing failure analysis on an A356 Aluminum alloy wheel subjected to rotational loading, with a maximum load of 650 kgf and a torque of 4600 Nm. Cracks formed in the wheel after 1.3*10^6 rotations. My job is to perform a stress analysis to determine the regions of maximum...

Hi all, I am currently doing an undergraduate research project on the Bose-Hubbard model with hardcore bosons, and I am studying it theoretically using the Monte Carlo Stochastic Series Expansion method. I would very much like to ask my supervisor this question, but he seems extremely busy...

Could someone explain how to find the net force of an object based on a diagram. For example a 2 people walking with forces labeled weight force, reactant force, thrust and drag on one image all forces are balanced which I know the net force would be zero however on the second image thrust is...

I'm studying Auto Transformer phasor diagram, and am having some doubts. I'd be grateful if someone could help me out with them. Book has equation: I understand that using Kirchoff's law we get minus sign for (I2 - I1) term, but shouldn't it be positive as per concept? Negative sign means the...

Homework Statement A lightly damped oscillator (mass, m, and spring constant,s, damping constant, b, with one end fixed) under external harmonic force (F0cosωt).(i.e., Standard mass-spring system with lubricated damper, and driven by an external harmonic force.) Since it is lightly...

Homework Statement :[/B] Sketch in an argand diagram: |z − i| = 2 Homework Equations z= a+bi The Attempt at a Solution |z − i| means that the distance from z to i is 2, however I am not sure where to put z.

Okay so I have a friend who has a 3rd grader and is 7 years old and he is having trouble completing this homework... we can't figure out how to do the problem on the 2nd page, we understand the example in the first page Page 1 Is the example page. I am going to attempt to translate to English...

Homework Statement Question: Drawn an orbital overlap diagram to represent the bonding in ammonia, NH3. Homework Equations [/B] none The Attempt at a Solution I learned that bonding occurs with the outermost s and p orbitals. For nitrogen: 1s2 , 2s2 , 2p3 For Hydrogren: 1s1 X 3. This is...

Who can make the most impressive, interesting, or pretty TikZ picture? This third challenge is to create a vector diagram. Such as used in geometric figures, or in physical diagrams with forces and velocities, or in state diagrams. For more impressive arrows, we might use the arrows tikz...

Homework Statement want to find the direction and moment of this diagram. Homework Equations The Attempt at a Solution [/B] I really do not have any idea about this question. So If someone helps, It'd be great.

Homework Statement In a school . 35 students like reading , 50 student like jogging , and 15 students like both . How many person like either reading or sports ? The ans is 35+ 50 -15 = 70 ( Ans given) but , i think the ans should be 20+ 35 = 55 only Which is correct ? If my ans is wrong...

Homework Statement It's given that the total probability of event b =P(B) If A1 , A2 ... An are mutually exclusive and exhaustive events , then probability of B = Homework EquationsThe Attempt at a Solution P(B) = P(A1) x P(B | A1) + P(A2) x P(B | A2) + P(A3) x P(B | A3) + ... P(An) x...

Homework Statement Simplify the block diagram. I uploaded a single image as it's the easiest way to do this problem. Homework Equations None at this stage. The Attempt at a Solution Please see the image.

Homework Statement [/B] A screenshot with everything given Homework Equations No idea The Attempt at a Solution No idea I'm not sure how to solve this or where to look for a solution. I was given this yesterday and have a test tomorrow. The professor has not gone over this at anytime...

Homework Statement Two cylinders, each with a mass of 10kg, are lying on an L profile. Neglect the thickness and weight of the L profile. Calculate the reaction force in b and e. Homework Equations G = mg The Attempt at a Solution So I tried to make a free body diagram of the cylinders. I...

Hey all, 2 weeks ago I created a challenge to create a geometrical diagram, like a triangle, that is somehow interesting or impressive. Now the moment of truth is here. Please everyone, give your vote! Voting will close in 2 weeks time. Let me recap the submissions.I like Serena...

This is a practical issue I've trying to resolve by understanding the physics. While I talk sailing jargon, ultimately this is a question of simple torsional forces on a body. So: In a high wind, when heeled over, my boat does what's called "rounding up"; it turns sharply into the wind -...

Who can make the most impressive, interesting, or pretty TikZ picture? This first challenge is to create a geometrical diagram, like a triangle, that is somehow interesting or impressive. We might make it a very complicated figure, or an 'impossible' figure, or use pretty TikZ embellishments...

1. The problem statement, all variables and given/known d Hi have this problem but I don't know how to represent, however I've tried. The problem says: You are designing an electric grill and you have to choose a resistance circuit between the circuits shown the figure. Consider that every...

Hi there, I have this performance task on Math and I'm struggling with this Venn diagram problem. 50 Grade 6 students were surveyed on their favorite types of kid-friendly content on Youtube. 17 liked Gaming Videos only, 6 liked Gaming Videos and How-To videos, 2 liked How-To and Comedy...

Hi. I'm reading an article about QCD phase diagram. https://arxiv.org/abs/1005.4814. I want to derive eq(20), but I don't know how. Does anyone know how to derive this?

1. The problem statement, all variables, and given/known data So I am studying for the ASOE physics test. I came across the following question where I can't really understand the answer to it: The actual answer is: http://prntscr.com/fum35c Could someone help me and explain what they are...

This Feynman diagram accompanied the announcement on the public LHCb site. How would you describe the origins of the up and down quark anti-quark pairs that that contribute to the decay of the ##\Xi_{cc}^{++}##?

I am starting a new thread as my last one was unceremoniously hijacked by those who should know better and then closed by moderators when boundaries were crossed in the hijacked thread. I am not complaining as it was an interesting diversion, but now, if acceptable, I would like to return to...

Homework Statement 1.0 mol sample of an ideal monatomic gas originally at a pressure of 1 atm undergoes a 3-step process as follows: It expands adiabatically from T1 = 588 K to T2 = 389 K It is compressed at constant pressure until its...

Homework Statement Draw the bending moment diagram the top part is the question, the bottom part is the answer. Homework EquationsThe Attempt at a Solution There is a force at the wall in x and y direction and a moment ##F_x, F_y, M_w## Sum of forces in x : ##F_x-1000=0, F_x=1000## Sum of...

Hi, I would like to ask you how to properly describe the Feynman diagram of the Vector Boson Fusion where the Higgs boson is produced. Two quarks scatters two vector bosons (that means boson W or Z) at some moment which influence each other and produce the Higgs boson. Is that right...

Homework Statement [/B]Homework Equations Mathematica The Attempt at a Solution I want to plot the diagram using Mathematica. I saw on the net there is some kind of programming needed for this. Do I need to learn programming for doing this? If yes, how to learn it?

Can anyone please illustrate highlighted part? Can anyone please explain me how invariance of s^2 is useful in characterization of events? I didn't understand the highlighted part i.e. how to determine velocity of S' relative to S?

I was studying about Crystal defects in crystals and came to know that it has huge effect on band diagram.I don't know about their specific impact on band diagram.So what are major impacts of crystal defects on band diagram.?

The images have been taken from page no.74,75 and 76, special relativity , A.P.French,1968 I understood that A1' and C1' are not simultaneous in S -frame. But I don't understand the principle on whose basis it is claimed that A1' and C1' are simultaneous in S' -frame. Here, the simultaneity is...

Homework Statement Hi guys can someone tell me if I am wrong, or missing reading this question. For part a I need to draw a PV diagram now it states that is is being expand isothermally yet when I look at the pressure it dose not change, which is confusing me beacuse it dose in a isothermal...

Consider the diagram attached for the process quark + quark -> photon + quark + quark. I want to check I have the correct expression for the amplitude for this process by using the Feynman rules. ##i,j,m,n,l,p## are colour indices. ##k## is the loop momentum. I don't care about overall factors...

Hey everyone, I have been doing some research in regards to floating an object, and possibly have it rotate. I am thinking magnetism is the way to accomplish this, but if anyone else knows another method I would love to hear it. I created a simple diagram on what I am trying to accomplish...

How would cooling curves of a Pb-Sb phase diagram get effected if the composition had an added .5% carbon wt. concentration? My guess would be by adding an increased concentration of carbon, this would result in a increased duration of cooling needed to reach the eutectic reaction line. Any...

Hello, I'm new to the forums and hope this is the correct area to post this question: I've Recently conducted a lab in class where we melted an alloy of Pb-Sb in order to determine its cooling curve. We did two different weight compositions (11.2% Sb) and (17.5% Sb) and recorded their...

I'm a bit confused as to what the Temperature-Entropy diagram looks like for an ammonia heat pump. I understand perfectly how a freon type of refrigerant heat pump works: starting with working fluid at a state of a low-Temperature & high-Entropy gas (which is at low pressure), do work on the...

Homework Statement Draw the ray diagram of the case of a diverging lens where both object and image are virtual, that is ##f<0## , ##p<0## with ##p<f## Homework EquationsThe Attempt at a Solution I did not find this particular case of ray diagram in any textbook so I would like to know where...

Hello to everyone, I am an undergrad mechanical engineering student. Currently in 4 semester. I have this one major problem. I cannot memorize facts and diagrams. We have this subject, production technology, which consists of lots and lots of facts and for me an overwhelming amount of...

Homework Statement Understanding the free-body diagram of a bead on a circular hoop. I am calculating all forces on with x and y direction and a little confused. Why is sin*angle_x and cos*angle_y reverted in this? Usually i go sin with y and x with cos. Why is the force n=mg/(cos*beta) and...

Hello, I noticed something peculiar when looking at the Minkowski Diagram and I'm not sure how to interpret this. Let observer A be the reference frame for the diagram and B someone who travels with respect to A. The red line is the displacement of light over time. The blue, yellow and green...

Hi. For a state of nitrogen in which temperature is higher than the critical temperature the state is presented on a different curve. I do not remember any curve for superheated region. Source: Introduction to Engineering Thermodynamics by Sonntag/Borgnakke. Thank you.