Homework Help

I know the ideal gas equation (and how to derive it):PV= (1/3) x N x m x (U)^2 where: P-Pressure, V-Volume, N- number of molecules, m- mass, U- mean speed of molecules. The problem is my book gives a "different" version of the equation:PV= (1/3) x n x M x (U)^2 where: P-Pressure, V-Volume, n- number of moles, M- relative molecular mass, U- mean speed of molecules It goes on explain that: the relative molecular mass (M) of any substance expressed in grams contains the Avogadro constant number of molecules. That is: M = m x (Avogadro constant). Is this equation (and explanation) correct? I can't find a website which gives a suitable explanation. Can anyone ple…

Hi Guys, Please help with this problem: The frequency of daltonism (XR) in males is 0.08 a) Calculate frequency of heterozygous females. b) What is the probability of mating of affected male with non-related heterozygous woman? c) What is the frequency of mating of affected male with heterozygous woman in the population? My Solution: a) 2pq = 2 (0.92) (0.08) = 0.1472 b) 2pq x q = (0.1472) (0.08) = 0.011776 c) I don't know what's the difference between (b) and © ???

Hello Friends, I wana ask that if two processors Processor01 and Processor02 have same number of components but Processor01 had 16 registers on the other hand Processor02 has 64 registers. Which processor is best in terms of its speed, size and cost? Take Care _________________________________________________________________________________________________ I have posted this query on another forum here but I think it is more suitable so if mods like to delete unsuitable thread of mine then they can do but please inform me.

Hello, i need help with my science project. me and my friend will take 2 sugar beets, one sugar beet will be exposed to more co2 than the other. then we will measure the amount of sugar (glucose) and then compare the two amounts. to do this one sugar beet will be inside a jar filled with co2 from a compressed can of co2. both sugar beets will be watered equally under the same amount of light and the same soil will be used. then after a few days we will extract the sugar out of the sugar beets and then we will compare the amount of sugar from both sugar beets. what we are trying to find out is if a sugar beet exposed to more co2 will produce more sugar than the sugar bee…

Hello, I'm taking Wave Propagation Through Solids and I am required to have a background in linear elasticity. Unfortunately, I haven't take that course. Knowing that the coordinates x1 , x2 , and x3 of a point are three independent variables, how can I show that the relation Ai = (dxj/dxi)Aj implies Ai = (dxj/dxi)Aj Where A and x denote the transformed coordinates? I'm thinking I might have to use the Kronecker Delta or transform differentials..but I'm not sure how to prove this. Any help? Thanks!

Hi, I want to find the derivative of this but I can't use the quotient rule. So I figure I'll use the chain/product rule. I'm new to calc though.Do I use both? Or just one? This is the chain rule I think. Do I go on to use the product rule?

the problem ends at where the number 6.7 is at

6.70 cm-tall cylinder floats in water with its axis perpendicular to the surface. The length of the cylinder above water is 1.70 cm. Ok, so there's 5.00 cm in height of cylinder above water. The density of water is [math]\frac{1000kg}{m^3}[/math] or [math]\frac{1g}{cm^3}[/math]. Is this even possible to do without the radius?

I need help with question from homework in linear algebra. This question (linear transformation): http://i43.tinypic.com/15reiic.gif According to theorem dimensions: dim(V) = dim(Ker(T)) + dim(Im(T)). dim(Ker(T))=2. dim(V) in R^4, meaning =4. We can therefore conclude that dim(Im(T))=2. But how can find this specific linear transformation? Please help me to solve this problem. Thanks.

If anyone could give me their thoughts on this topic, such as whether you think that the way they evaluate video games are too lax, even stating if you were not aware of it's affects is a great help. I'm raising public awareness on violent video games and their effects as a part of a project I'm completing. Sorry for it's length, but I did managed to summarize seven pages to two. There is severe violence against both genders within video games. Video games further the violent idea of masculinity that men must show power and control through physical appearance, strength and even emotionally, by giving them negative role models and behaviour script (Jhally, 1…

I need help please with a basic integral. http://i40.tinypic.com/a589qp.gif These integrals is immediate? What the general formula? And here, exercises 1 & 4: http://i43.tinypic.com/zksmck.gif Thanks.

I'm tediously working my way through the first chapter of "Basic Technical Mathematics with Calculus", Seventh Edition, by Allyn J. Washington. This is strictly self-study on my part so I don't have an instructor to clarify things for me. The word problem given is: "Two gasoline distributors A and B are 228 miles apart on Interstate 80. A charges $0.85 per gallon and B charges $0.80 per gallon. Each charges $0.05 per mile for delivery. Where on Interstate 80 is the cost to the customer the same?" I first designated the cost of delivered gasoline from A = $0.90/gal*mi and the cost of delivered gasoline from B = $0.85/gal*mi. I then designated x = miles from A.…

hey ppl i got a blck light.. ..... i m planning 4 a uv dance.. bt itz small cnt give light on d wole stage well i want it to reacton d wole stage wad suld i do??wuld itz reflection wrk.. like if i try to sspread it with mirror<br class="Apple-interchange-newline">

Hi all, Just a quick question regarding agarose gels. How much 1XTBE would you need for 50ml of a 1.5% gel? And would a 1.5% agarose gel be sufficient to run my PCR product which is supposed to be 355bp ? Thank you

The influent pump building at the wastewater treatment plant where I work receives flow from a 6 ft diameter interceptor sewer. Our pump controls maintain a sewage level of 2.5 ft in this interceptor. The generally accepted flow velocity in a sewer to prevent grit deposition is 2 ft/sec. A discussion among the plant operators here raised the following question: What rate of flow is needed to maintain a 2 ft/sec flow velocity in this interceptor at a water depth of 2.5 ft. As a practical matter we measure flow in terms of millions of gallons per day (MGD). As an approximation I calculated 1/2 the cross-sectional area of this interceptor (3 ft water depth) and then subt…

Hello ladies and gents. Submitted so no longer applicable. Thanks anyway guys.

X is a n*k matrix, k < n X is of full rank k (full column rank) X'X is of full rank and therefore invertible [math] P_x = X(X'X)^{-1}X'[/math] Show that [math]P_x[/math] is symmetric and idempotent. I figured out how to show it is idempotent. Here is my attempt to show it is symmetric: [math] (P_x)' = (X(X'X)^{-1}X')' = X'[(X'X)^{-1}]'X = X'(XX')^{-1}X[/math] Maybe someone has a sheet for all the algebra rules for linear algebra that would be helpful?

a 1.924 L solution is made by dissolving 6.432g of Li3PO4 into water. Calculate the concentrations of the ions present when the Li3PO4 solution is added to 1.598 L of an Ag3PO4 solution. So, I can calculate the concentrations of each ion in the separate solutions and in the combined solution, but then I think that if something precipitates, the concentrations would change. According to my calculations, the calculated Ksp of Ag3PO4 exceeds the real Ksp of saturation for the solution. This would mean a precipitate of Ag3PO4. From there, I am lost. I don't know how to calculate how much precipitates and whether I should subtract the precipitated solid from the concentrat…

My undergraduate chemistry course book states that the process: "Two blocks of iron of different temperature are brought into closer contact and thermal equilibrium is attained" is a "reversible" process. I don't exactly understand how this can be, since the process will not occur in the reverse direction spontaneously (i.e the previously warmer block will not get heated up again with respect to the other block, spontaneously). I cannot find any suitable websites that give a good explanation on this matter. I'm sure that I'm looking in the wrong direction. Just direct me in the right direction, I don't need the answer. Thanks.

I did an experiment at school, but they couldn't give my group any sterile cotton swabs like we asked so we had applied the bacteria with our bare hands. Now when I am analyzing the results the outcome seems wrong, I was testing the effectiveness of anti-bacterial hand gel and there was more bacteria on the plate with gel. I was wondering if not using sterile equipment affected the results?

Hello, just a quick question, I am writing a little piece about theory of mind and I someone asked me something that should be obvious to answer but I feel a bit stumped. If theory of mind is such an excellent adaptation to our reproductive success, then why is the number of people diagnosed as autistic increasing? My thoughts are.. diagnosis for autism has changed and this has increased the number of people labelled autistic? Autism too generic a term to provide an accurate picture? Potential environmental factors could be taken into consideration when looking at the number of people receiving this diagnosis? Quite a rushed question, but a third pers…

Sorry i couldn't do this in a poll, I have one too many questions lol I need to conduct a survey as part of my graduation project at my high school. The more people that can answer and help me out the better! Simple yes or no answers will suffice (except for the last question, obviously, a simple guess is all that's needed). 1. Do you support the government funding of animal tests in the United States? 2. Within the last decade, do you feel animal testing has benefited the United States? 3. Do you support cosmetic animal testing in the United States? 4. What percentage of animal tests conducted in the United States do you think are carried out by cosmetic companies…

Hey! I just wanted to pose a question that I hope someone can find the time to answer. It's regarding part of my homework - don't worry, I already have the answer. I was just confused about some of the methods. The question is part of a larger one: "Calculate the pOH of a 0.0500 mol dm-3 aqueous solution of methylamine. State any assumptions made in your calculation." We are given the Kb value at 4.37*10-4 mol dm-3 The assumption is referring to the fact that I can disregard the concentration value in the denominator of this equation [H+]2/C-[H+]=Ka I could see two ways of calculating the answer. The first one gave me the right answer. If [H+]2/C=Ka then …

So I'm preparing for my Organic final by looking at old tests and trying to figure out what I did wrong. Here's a couple things I had trouble with, if you know how to solve any of these the help would be greatly appreciated. 1. Draw the product and a mechanism for the following reaction 3-ethyl-3-pentanol <--(in the presence of H+)--> (blank) + H2O 2. Propose a method to prepare compound B from compound A a. Compound B is trans-1-2-cyclohexanediol, compound A is cyclohexanediol b. I don't know how to name these, but both compounds are a benzene with an ethanol group. The difference is that the OH is on the first CH2 of the ethyl in compound A a…

This is what is written in my chemistry book. Silicon forms compounds with hydrogen which have chains of up to 7 to 8 atoms, but these are compounds are very reactive. The carbon-carbon bond is very strong and hence stable. This gives us the large number of compounds with many carbon atoms linked to each other. Is it true that the carbon-carbon bond is stable and that enables large number of compounds to be formed ?