Homework Help

there is this science council in my school...and we need to submit a decent research proposal in oreder to enter it. this is supposedly to test one's research aptitude and all.... so, i'm just wondering if anyone out there has an idea for a research proposal, linked to the life sciences field.... one of my pals suggested researching on the gene gata5 in zebrafish. this gene produces the protein nkdx2.5 (i'm reciting this from memory, and am uncertain of the real name of the protein produced.however, i can ascertain that the gene is the actual one) the gene, when act6ivated, converts the cell into a heart cell. researchers have supposedly discovered that any cell that ha…

I'm doing questions on acids and bases, and I need to work out the pH of a mixture of sodium hydroxide and propanoic acid. I know the concentrations of each, and I know the number of moles of unreacted propanoic acid and its concentration. The question tells me to use the equation pH=pKa - log [acid]/[base] I'm ok til I get to the pKa bit, do I use the pKa of propanoic acid which I know to be 1.3x10-5, or do I use one for sodium propanoate? My chem teacher said to look up the appropriate pKa value but as I don't know which to use I'm a bit stuck, plus I can't find a pKa value for sodium propanoate anywhere. Someone help

hey guys...i've been asking some hints and ideas where i could find resources for my physics speech..... i am to do a speech in physics about GPS: on how it was developed, how it works, how its used, the principles.... please point me to the right direction.....

for my independant chemistry class i have to give a presentation relating to reaction rates and factors affecting them. We got a list of possible topics and i chose: "research various types of commercial manufacturing and the use of catalysts and/or inhibitors in the formation of products and in the treatment of by-products" so does anyone know of any particularly interesting manufacturing reactions with catalysts or inhibitors? thanks.

Hello everyone! It's not really a homeowork, but it fits perfectly in this forum category....Actually, today when I went to school, my teacher annouced that I have failded my biology test, and I got 59 out of 100. So I am posting this thread becasue I don't want to fail my reaget, which is very soon.. And I don't want to get lower grades in the the coming semesters... So could anyone please give me biology studying tips, so I could get grades. And if you could help me understand the whole Living Enviroment thingy, so it would be greatly apreciated!!! Please don't think that I am the worst student ever... last year I had the average of 87.05, which is not that…

Hi guys, I have to do a science project for my G/T Chemistry class (doesn't have to be involving chemistry) and my partner and I are going to test the effect that different substances have on radiowaves. Our only idea so far is to place things like "DefendAir Radio Shield" paint, metal, glass and other materials in front of a remote for a RC car and record the distances that the car travels. PLEASE, any ideas would be very much appreciated.

What is the solution to the differential equation [math] \frac{dy}{dx} = \frac{x^3}{y^2} [/math] where [math]y(2) = 3 [/math] What are they asking for? I'm I supposed to do seperable differention, integrate by parts, or what? Please help me! Thank you.

Hi, Does any one know the density of petrolium. Our chem teacher asked us (and suprisingly none of us knew )

Those who post threads in here most are desperate and helpless, so am I. Recently I am working on Respiration Project + Assignment. The 1st project is working pyruvate molecules with radioactive carbon. Then they all incubated with all components of Krebs cycle long enough for 1 turn. Then I need to explain why the CO2 produced only one third of it is radioactive? So, I decide to start with Glycolysis Process until oxidative-decarboxylation of pyruvate because there's where the CO2 is released before entering Krebs Cycle, am I making a good start? My another question is imagine a starving cell reached the stage where every bit of its ATP was depleted and conver…

Ok look this volcanoe projeect im doing is killing me becuase 1. All the good topics i find cannot be done because my teacher has a "low" budget and can't get the right equipment. 2. Some topics are too "simple" and won't solve any thing like for example the plant life that grows around Kilauea. 3. THE INTERNETS SEARCH ENGINES SUCK LIKE HELL! I cant find a internet site that will tell me the mineral deposites around Kilauea and the elements like magnesium and stuff. 4 The topics i had in mind were taken by other studens. 5. My stress level is rising and my topics due tommorow.... PLEASE HELP ME OR I WILL BURST FROM THE INTENSE HEAT OF STRESS!!

hi people.. i got a simle question in algebra i can't figure out.... you know about factorizng algebraic equations right? e.g. (XX-YY) = (X+Y)(X-Y) (XX+2XY+YY) = (XX+YY)(XX+YY) you know, basic stuff.... but there's one algrbraic expression i can't factorize.... (XX+YY) please help... Note that double character means squared, e.g. XX = X*X or X (squared)

Hi can any help me with this question i have to do by tomorrow, i would be very greatfull. A cylinder of helium has a volume of 600cm3 (cubed). The cylinder contains 200g of helium at a temperature of 25*C (degrees Celcius).Determine the pressure of the helium if the characteristic gas constant for helium is 2080 J/(kg K).

I'm doing some research hw on fuel air bombs....does it even exist?

Perhaps some of you hagve heard of a program called G(ifted)T(alented), which is taken as an elective in highschool, for kids who excel in a certain subject. It involves a project that you and a mentor do over the coarse of a semester, or a full year. I want to do something in the sciences, particularly, something in microbiology, or genetics. Does anyone have any ideas for a project that would meet the following criteria- -Must have something to display at the end of the project -Must go above and beyond the current science coarse (next year, for me it will be H Chem 10) -Must be finished by the end of the school year (about 180+ days...keep in mind also that much…

Hey everyone I'm currently doing my HSC and i run a website with all of my work (i.e. practicals, syllabus dot pionts and assessment tasks on it). But remember that I'm doing my HSC this year so not all of the imformation will be there. The address for my site is www.geocities.com/jamesyscience Also if you have any questions about the HSC or Preliminary HSC, feel free to contact me at jamesy_1988@hotmail.com feedback on the website and the information would be greatly appreciated Thanks Jamesy

[math]\lim_{h\to\.0} \frac{tan3(x+h) - tan(3x)}{h} [/math] I know the answer is [math]3sec^2(3x) [/math]. But I'm having a very difficult time finding why, could anyone help me? What trig identities do you need? Thanks in advanced!

I am doing a speech in chemistry about some natural resource extraction. Well it is basic stuff, but i don't have an idea where to start. I am thinking of doing something about fossil fuels. I got another speech for physics, and i need some other resource for GPS other than the ones i found at howstuffworks. Any other suggestions are definitely welcome thank you in advance mcoy _+_

Hi, I am having trouble understanding some things. Firstly why is Piebald trait related to a gene on an autosome and not an X chromosome? The mother is the carrier of the trait and the father is not, they have 4 children, 3 of them (2 sons and one daughter) are affected and 1 isn't (another daughter). What would be the chance be of one of the affected sons passing the trait down to his children? I worked it out to be 1 in 4 chance but I am not so sure now. Any help would be really appreciated. Thanks.

I need to know what all of the properties of quadrilaterals are and how they relate to each other. if someone knows anygood website or just want to reply to tell me that would be awesome. THX!!!!

Hello everyone! I am trying to solve a Math question, but due to how hard it is I am not able to find the answer. In the attachment you see a triangle, what I am trying to find out is the values of those variables. If you could help me find the value of "Z" I am pretty sure that it would be eassier for me to find the rest. Thank you in advacne for the help!

The title should explain its self but...I'm getting B's in some of my classes cause I see no point of studying and im getting lazy....Psssh yeah ok. So please make this go away! ITS KILLING ME!

Hey everyone! I am researching about offspring and I don't even know what it is. I looked it up at dictionary.com but it doesn't explain it very clearly. Could anyone on SFN please tell what this term is all about? Any help would be greatly appreciated! Thanks a lot!

Hi I am working on balancing some equations in chemical reactions. I have worked hard, but am still stuck, and now feeling very unsure of myself. Could anyone see if these are done correctly, and if not, help me see what I am doing wrong here? (also how to do subscripts and superscripts here?) My equation in need of balancing: Al(OH)3 + H2SO4 ----> Al2(SO4)3 + H2O my answer: 2Al(OH)3 + 3H2SO4 ---> Al2(SO4)3 + 3H20 Is this correct? It looks like it to me, but am not sure. Any help GREATLY appreciated!

What's the reaction between alkalis and some reactive metals? I don't have that reaction in my books/ Why doesn't sulphuric acid react with calcium sulphate?

I am seriously in need of help for a personal interview for my science project question. My question is: How do people see color? Does rotation (if the object is rotating) affect what color that we percieve? Awnswers would be greatly appreciated.