Homework Help

Hi So I have an essay. I am thinking about doing following topics:- *Genetically modified food and food safety *Human Cloning *Information technology in school. I having a lot of difficulty in finding 2 distinct sources[ either from a book or journal] one which favors the topic, and speaks against the issue. But all im able to find are reports and analysis of what other people are saying, not what the author is trying to say himself. Reason its so difficult is that im not allowed to just use some random internet blog as source, it has to be qualitative, with proper references, atleast 5-10 pages article,like a chapter from book. anyone know where i…

1) If det(AB) = 0, is det(A) or det(B) = 0? Give reasons for your answer. Q1) First, cannot both det(A) or det(B) be 0? If it can, is this statement false. In any case, how can I prove that this is true for all statement since I only know how to find an example to show this is true, which cannot represent all the possibility. 2) Show that if A is singular and Ax = b, b is not equal to 0, has one solution, then it has infinitely many. Q2) How to approach this question? 3) Let A^2 = A. Prove that either A is singular or det(A) = 1. Q3) How can I approach this question?

Hi everyone, I have to write two essays and just need some ideas as what type of things/topics i can include in them, the first one is better, but the second one i dont understand at all. here are the essay titles The importance of pH buffers to life (chemistry) how the structures of macromolecules affect the properties of a cell (biochemistry) If you have any ideas please do let me know thanks

hi there i'm doing a lab report about investigation of the order of the reaction of iodine wif propanone and i find it a bit difficult so i'd like to ask a few questions , hope somebody could help, thz 1.) How does the starch indicator function?why is it added near the end point? (can i just write starch turns blue when meetin iodine? and i really dun noe y it must be added near the end pt==" ) 2.)the tutor requests us to outline another method to follow the kinetics of the reaction. what method?? 3.)and wt means by " mechanism of the reaction"? please help!!!!!!!!!!!!thz a lot><

Two neutral metal spheres X n Y are placed in contact with each other on two insutating supports. A positively charged rod is brought close to X after Y is earthed with a conducting wire. I would like to ask how's the distribution of charges on the spheres.

<font class="Apple-style-span" face="Verdana"><font class="Apple-style-span" color="#0000FF">GM foods also known as Genetically Modified Foods are foods that are changed genetically such as injecting of certain DNA. Such foods have certain advantages such as being pest-resistant, contain more of certain vitamin and etc. However, some of these foods causes allergies to people. </font><font class="Apple-style-span" color="#FF0000">My question : <i>How the GM foods industry develop throughout these years?</i></font></font>

Brown eyes(B) are dominate over blue eyes(b) Dark hair (D) dominate over blonde hair(b) Determine the genotype of women with blue eyes and hybrid dark hair and a man with hybrid dark hair and hybrid brown eyes. I believe the genotype is bbDd x DdBb ^is that correct I also need help determining the possible gametes I believe its Db db Db db < female DB Db dB db < Male ^is that correct? Please explain.

My English professor has assigned us an argumentative essay to write, and considering that I work in mental health, I would really like to argue that most of the patients I deal with are heavily overmedicated. I'm still searching the web, but could anyone here point me toward articles that I could utilize or that you feel may be useful or worth a read? Thanks

Hiyya, Please could someone give me a helping hand... Im working on an assignment linking the effects of zinc deficiency on nutritional status and pneumonia... I understand that zinc deficiency affects: Th1 cytokine production, B lymphocyte help, antibody production, and causes an imbalance in th1 and th2.... Is anyone able to help me with the reason why there's a link to pneumonia?... like, what is it that zinc deficiency does that leaves us susceptible to pneumonia?? anyhelp would be most appreciated.. Thankyou

I had a few questions regarding the properties of UV light. 1. Why is it easier for long wave UV radiation to penetrate the earth's atmosphere than shortlength waves? 2. What makes sunglasses that protect from long wave UV light different from the sunglasses that protect from short wave UV light? 3. Also, with things like safety glasses and car glass, do they absorb or reflect the UV light that they don't allow through? Thanks for the help in advance!

Hi guys, I was wondering of any of you have access to this paper: "Bispecific single-chain diabody-mediated killing of endoglin-positive endothelial cells by cytotoxic T lymphocytes" (2004) by Korn, Tina Müller, Rolf Kontermann, Roland link here: http://journals.lww...._Killing.3.aspx If so, please shoot me a PM. I have tried almost everything to get it (except actually buying it) but haven't had any success. Help would be immensely appreciated. Thanks!!!

what are the benefits from the 2 diff ways that homologous chromosomes are positioned at metaphase in meiosis & mitosis?

Hey all, we're reviewing trigonometry in our math class, and worked the following problem: A boat is moving at a steady speed towards the base of a cliff. At one point it is seen under an angle of 20° from the top of the cliff. Ten time units later it is seen under an angle of 30°. What is the velocity [math]v[/math] of the boat? We can solve this using trigonometry; if we denote the horizontal black strip [math]x[/math], the horizontal red strip [math]y[/math] and the whole horizontal strip (that is both the red and the black one) [math]z = x + y[/math], we have [math]z=30 \cdot \tan(70^{\circ})[/math] [math]x = 30 \cdot \tan(60^{\circ}) = 30 \cdot…

We've done an experiment on the rate of reactions using catalysts, we now have to do a right up of it and I'm stuck on explaining how the catalysts worked in the experiment i know that the help break chemical bonds in reactant molecules and provide a 'different pathway' for the reaction, but how do they do it. The experiment was using 10cm3 potassium iodide solution, 10cm3 sodium thiosulfate solution, 5cm3 starch solution add the catalysts and then add 20cm3 of potassium peroxodisulfate solution I've been told by my teacher that it is something to do with the shape of the molecule and the catalysts, but i cant remember exactly what she said, or that i understood it.

Back in school after more than 10 years to finish a BSc in Biology. I am lost, and trying to recover, recoup what I was taught. I need help with the follwing experiment question Design an experiment to determine the relationship of water properties & fish abundance (global). Come up with a - hypothesis - 3-5 predictions and - propose a way to come up with a collection of data. Water properties I looked at 1. salinity 2. oxygen content 3. temperature *(possibly) 4. pH Proposed Hypothesis: The temperature will affect the salinity of the water and thus the abundance of the fish between a temperate and an arctic environ. Shot down by lectu…

Hello everybody, I had a question in regards to ANOVAs and multiple comparisons corrections (Bonferroni mostly). I am running a 3 way repeated measures anova (2 within-subjects factors - one factor with two levels, another factor with most likely more than 3 levels + 1 between subject factor). Lets name this ANOVA #1 I am running this with EEG spectral power as the dependent variable. Now if I divided the power into the traditional power bands (delta, theta, alpha, beta and gamma), then I will have 5 ANOVA's (one for each band). Now where I stand confused, theoretically, is that do I do multiple comparisons corrections for a) the 5 different ANOVAs I a…

First, thanks for checking out my topic! The last time I had to deal with pH problems was in Biochemistry last year, so this is probably a simple question that I'm over analyzing because I haven't done this type of problem in a while. The question asks: Calculate the pH of 0.1 M solution of glycine hydrochloride. I know that HCl is a strong acid and so it should have completely dissociated in the solution, and I know the two pKa values for glycine are 2.34 and 9.6 (should I be using the pI or should I use the more acidic group's pKa?). I looked up Glycine-HCl and found out it can be used as a buffer. I also know that in the HH eqn, [HA]=0.1 M because it's the co…

i have this : 15,76=0.43*(20)n i have to calculate n... 15.76/0.43=20n 36.65=20n n=log2036.65 is this right???

I'm new here..so hello everyone! *Smiling* I'm a first year student with some questions to biochemistry, trying to understand this to the spring exam. I'm from Scandinavia and not that good in English..but I'll hope this is somewhat understandable and clear. 1. Enzymes doesn't influence equibrilium, but they lower the activation energy. I wonder how this is possible? Isn't the activation energy expressed in free Gibbs energy? If so, how can the equibrilium be unchanged? I thought delta Gibbs was the same as the distance to equibrilium. Or are we maybe talking about different delta Gs? 2. Under ATP synthesis the enzym ATP synthase undergoes rotational ca…

How do you choose a confidence interval and set the significance level ? for example CI= 95% and a=0.05 . I have been doing questions on t-statistics and ANOVA and i cannot do this part of the question, so i dont get correct results then. Please help

1) show that if AB = AC and A is nonsingular, then B = C. 2) show that if A is nonsingular and AB = 0 for an n x n matrix B, then B = 0. 3) Consider the homogenous system Ax=0, where A is n x n. If A is nonsingular, show that the only solution is the trivial one, x=0. 4) Prove that if A is symmetric and nonsingular, then A^-1 is symmetric. Please help and show all your work or at least give me some directions! Thanks

1) Find an equation relating a, b, and c so that the linear system 2x+2y+3z = a 3x- y+5z = b x-3y+2z = c is consistent for any values of a, b, and c that satisfy that equation. what is the method to solve this problem? 2) In the following linear system, determine all values of a for which the resulting linear system has a) no solution; b) a unique solution; c) infinitely many solutions: x + y - z = 2 x + 2y + z = 3 x + y + (a^2 - 5)z = a For these two questions: Do I make this to be a reduced echelon form first? If yes, how to make it with some variables a, b, and c? If no, what is the right approach for this problem? Thanks

1) Is the matrix [upper row 3 0 and lower row 0 2] a linear combination of the matrices [upper row 1 0 and lower row 0 1] and [upper row 1 0 and lower row 0 0]? Justify your answer. Is it I just have to add the two matrices to see if they are equal the matrix, [upper row 3 0 and lower row 0 2]? 2) Show that the linear system obtained by adding a multiple of an equation in (2) to another equation is equivalent to (2). How to show that? Thanks!

Simplify this Boolean expression : F(a,b,c)=((c+a)' *(c⊕b)')' My answer is:F= ((c'*a')*(cd+c'd'))'=(c'*a')'+(cd+c'd')'=c+a+(c'd'*cd)=c+a Is that right? If not explain?

a sprinter accelerates from rest to a top speed with an acceleration whose magnitude is 3.8m/s2. after achieving top speed, he runs the remainder of the race without speeding up or slowing down. the total race is fifty metres long. if the total race is run in 7.88 s, how far does he run during the acceleration phase?