Homework Help

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I am unsure of what a model actually is. From what I have gathered , it would be a diagram with added maths , that all fits together. I have tried an example and made a make shift model to see if this is what you mean. Space is equal to 0, 0 is equal to constant. 0C+CE=EC Zero is constant, add constant energy, equals an energy constant. Would this be a simple model? Or more on the lines of using Plank constants etc?

Hi. I am learning English. Would you possibly tell me what the following mean? in the broader United States political system ..... Source: http://gmatclub.com/forum/two-divergent-definitions-have-dominated-sociologists-155936.html

Okay, I know I got close to this but then I am not sure. Any help is appreciated: Here is the problem: There is a string of pearls, which has 33 pearls on it. The largest and most expensive one is in the middle. The string of pearl is worth $65,000. Starting from one end, each pearl is worth $100 more than the one before, up to the middle. Starting from the other end, each pearl is worth $150 more than the one before, up to the middle. What is the value of the middle pearl?

This problem seems really easy (and probably is) but I am troubled by it for some reason. I can't remember it exactly because it was on a test in my high school chem. class today. What is the pH of a solution that has 12.00 g Na(OH)2 and 250.0 mL H2O?

Well, I have all summer to prepare for calculus based physics in the fall. I started last night and I've already come upon a problem. I'll just use this thread to ask questions instead of making 100 of them throughout the summer. Any help is appreciated. The problem is: A man throws a ball horizontally such that the ball leaves 1.5m above the ground. At what velocity must the ball leave his hand so that it reaches a point 20m away without touching the ground before it gets to that point? I got that the initial velocity in the y-direction is 0, which allowed me to find t. But that still leaves acceleration in the x direction and initial velocity in the x direction …

I cant find any images of an atomic structure and molecules or lattice structures for the following: Tugsten Polyethelene Silicon Carbide Quartz Crystal Glass Fibre Reinforced Plastic Shape Memory Polymer If you have any links to where I could find a suitable image for any of these please tell me. Thank you. PS. sorry I am not very good with chemistry I am a mechanical engineering student and am studying materials so thats why I need to know. Done some research more and found these, can you correct me if I am wrong please, I am not very good at chemistry. Tungsten Bohr Diagram: http://www.chemicalelements.com/bohr/b0074.gif Lattice Structure: htt…

Well i believe computer science is. I am writing an essay on why it is considered a science. I have found great peered reviewed articles on why it is but I cannot find a single article on why computer science is not a science. I need help in finding these articles. if anyone would be so kind in just point me in the right direction.

Life is thought to have originated in seawater. Analyse the chemical composition of a cell and indicate the ideal place for the origin of life on our planet.

Hello, I needed to survey a group of people for their opinion on some current political problem. I decided to do the one on Ken Bigley, since it is quite controversial. Please give your vote here and your reason if you'd like. I will give a full bibliography(so if you post your opinion and the reason for it, and i decide to include it in my project you will be mentioned in the bibliography.) Encrypted P.S This is for Socials Class, and I have two weeks left! So vote, vote, vote! And may i also ask Blike or Sayanora to make it so that this post is always first.

If someone "does" someone else's homework for them, is that necessarily "bad"? If so , in what way is it bad? Couldn't it be good, in the sense that the helped person understands better?

link deleted Hey i need some help, i need some feedback on my research. Thank you.

prove : [math] a^2+ab+b^2\geq 0[/math] for all a,b real Nos

Is this the correct explanation and Lewis structure for ch2O?

Hey everyone. I'm going to a Bible College right now, and we're taking a class called Science and the Bible. We're learning about evolution vs. creationism, and later on in the course, we have to write a report. Because we don't want to make things up and assume what people who believe in evolution think, we have to ask some questions. I will be handing in your answers completely unaltered. It would be awesome if you could answer them as best you could. Do you believe in God? If so, briefly explain your view. How do you think the universe began? How do you think life originated? Explain how you believe life forms evolved? How old do you think the earth is and…

hi, can somebody help me My task: Determine the force with which you have to pull the two suspend sorts at least on paper straight down, so that the paper unrolls. Allows you to choose which suspension is therefore easier. My approach: sin(∂)=Fn/T cos(∂)=Fg/T Fn = Fg/cos(∂) * sin(∂) = Fg * tan(∂) Fr= μ * Fn = μ * Fg * tan(∂) Fr=Fz Fz=μ * Fg * tan(∂) I think the difference between the two systems is the force exerted by the pulling force on the wall. Why is one easier than the other. I have no idea, how I can calculate the force which is produced by the pulling force. thanks already in advance

hi, ive been asked to plan an investigation to find out if there is a relationship between the concentration of phosphate ions in nutrient solutions and the number of cells dividing by mitosis in root tips (i'm assuming on using hydroponics obviously) but im really stuck! can any of you lovely people help me out, either with the scientific knowledge or actual investigation? Thanks, Angel (that is my real name please dont laugh at it!)

Please help me

The aminoacid glycine is often used as the main ingredient of a buffer in biochemical experiments. The amino group of glycine, which has a pKa of 9.6, can exist either in the protonated form ( -NH3+) or as the free base (-NH2), because of the reversible equilibrium R-NH3+ Û R-NH2 + H+ a) In what pH range can glycine be used as an effective buffer due to its amino group B) In a 0.1 M solution of glycine at pH 9.0, what percentage of glycine has it’s amino group in the NH3+ form? c) How much of 5 M NaOH must be added to 1 L of 0.1 M glycine at pH 9.0 to bring its pH to exactly 10.0? d) When 99% of the glycine is in its –NH3+ form…

Please reply and justify your answer

If we have a closed box filled with liquid . It is given a horizontal acceleration g/2 and a vertical acceleration g/2 . Then I tried to find the angle of the free surface with the horizontal . It should be tan^(-1) 1/2 as slope is equal to tan^(-1)a(x)/g . But here there is vertical acceleration does it affect the slope . Any help is appreciated

Is there a reason as to why an Alloy can have such a different melting point to its composing metals?

Hi, This is my first time posting so... hi Anyway, I have a question (which you may have guessed). I am writing a book/story which is about life on another planet and i am trying to keep it as scientifically accurate as possible. One thing which i need to know is; Is there any gas which is combustible in an atmosphere with no oxygen? Or even any substance? I'm pretty sure you will all say that all combustion is, is the rather hot, oxidising reaction which we see as a flame. My question is really asking however, if there was an atmosphere with no conventional earthly fire, could something at least resemble it or would i have to create something? I have to stay awa…

Hi. I'm doing a chemistry assignment in which I'm having difficulties. I am on a open university course (Environmental Sciences, first year) and never had chemistry in high-school (coming from the services area), therefore I need some assistance. Whatever help i get is welcomed. This is it: A solution of 100 cm3 of acetic acid (CH3COOH) with a concentration of 0.2 mol / L was titrated with aqueous sodium hydroxide solution (NaOH) at a concentration of 0.1 mol / L. a) Write the chemical reaction that translates the titration. b) What is the pH of the solution after adding 30mL of NaOH c) In a titration what is the meaning of the expression "point of equivalence"?…