Homework Help

Hello, I'm charlie and I need help with a physics graph. The graph's axes are average time and average acceleration. there are oly two points on the graph. After the average time .7 seconds the average acceleration is 6.13 m/s squared. Then after 1.36 seconds, the average accel. is negative 5.79m/s squared. The thing I need help with is that I don't know how many quadrants this graph will take or if it goes into the negatives. Lastly, It would be informative if someone could tell me what a change in average accel. is called Thanks in advance:D please:confused:

Hello all, Posted this in the 'Relativity' section but no takers..may be a little elementary for that folder, perhaps someone could help here..: 'ABC of Relativity by Bertrand Russell - A layman strikes..' Hope someone can help with my understanding of a part of this book. Train is travelling at 3/5 the speed of light and passes a stationary observer at a point which an event in the direction of the train occurs - "An event which happens in the forward direction along the railway, and which the stationary observer judges to be now (or rather will judge to have been now when he comes to know of it) if it occurs at a distance along the line which light could tra…

Provide three examples of how different neurotransmitter receptors can combine to generate different EPSPs. Where would i find this, and also an example with an experiment of some sort would be nice.. Thanks in advance

please help me with this.. There are 3 noncongruent cirles the distance between their centers are 21,23 and 25.. Find the area of the shaded region.. please d0 help me..

Okay, I'm a 10th grade student in biology honors and need a science fair idea. It has to be something measurable, not just like a research paper, I have a few ideas but they are boring. I really want to do something with animals, but it cant be like injecting them with any thing, more like behavior. And it is okay that we use animals in our schools rules. If you guys have any ideas even just like a question that could be answerd, insperation if you will, please please post, even if you dont think it is any good I may have never herd of doing it before. Thanks a bundle.

I am doing a Biology lab on dissolved oxygen in water, etc. etc. Mammals use about 1-2% of their energy breathing, while fish must spend about 15% of their energy moving water through gills for THEIR energy. Why the huge gap?!

What happens when you add more sodium ions (Na+) to an isolated nerve? Do you change the action potential? What happens when you add an abundance of potassium (K+) ions? Any help would be appreciated Thanks in advance A

Does anyone has any ideas for my essay? I want want some topic about biology and it is arguable. Thanks you!!

please help me correct my mistakes if i have any how does an observation abut an object differ frm an inference abut that object? when u observe an object, you do not touch it, all you are doing is studying it. When you interfere with the object you are being physical. 21.how are unicellular and multicellular organisms alike?how are they different? they both have basic unit of life. unicellular organism are like bacterias and such and Multicellular is like us. 24.how can a graph of data be more informative than a table of the same data? With a it is very easy to see the data, and much more organized. 25.what is a cell culture?how can a cell cultur…

I need to do an assignment in where I need to research on a Living Environment Biologist. I've searched for hours on google but I havent been able to prevail. I was wondering if anybody could atleast help or just tell me a living environment biologist. I've tried very hard to find one, but I just cant... any help would be greatly appreciated. Thanks

Hi all, I'm giving my niece a hand on her homework but it's been taking me ages to find the answer to this question... "Where can you find the longest food chain? Why?" If anybody here knows a link where I could surf, I would be ecstatic! Thanks a bunch!

I was just wondering if anyone knows where i can find a design for a working wind powered vehicle. Its for a middle school/elementary level science project and as of yet, haven't being able to find a design. Thanks for any help!!

The drawing shows an equilateral triangle, each side of which has a length of 3.77 cm. Point charges are fixed to each corner, as shown. The 4.00 C charge experiences a net force due to the charges qA and qB. This net force points vertically downward and has a magnitude of 524 N. Determine the magnitude and algebraic sign of the two charges. Im trying to solve. Please help me. Thanks.

Hello all, Hope someone can help with this simple problem I'm having rearranging this equation to put X in terms of Y: Y = 2X / (1-4X) Answer given is X = Y / (2+4Y) but I can't see why, can anyone help me out with the intermediate steps? Many thanks!!

The half-life of gold-198 is 2.7 days. After _______ days, 1/4 of the original amount of gold-198 will remain.

Elements in Compound/Masses of Elements X and Y---------------X=0.4g... Y=4.2 g Y and Z---------------Y=1.4 g, Z=1.0g X and Y---------------X=2.0g... Y=7.0 g a. What are the assumptions in solving this problem? b. What are the relative masses of X,Y, and Z? c. What are the chemical formulas of the three compounds? d. If you decompose 21g of compound XY, how much of each element is present? for A, I think compound YZ contains twice as much element Y than compound XY. Also, compound XY contains 5 times more element X than compound XY for B, Do I just have to add the masses? for C, I don't know how to do this one. for D, I'm thinking I have to solve C to sol…

Because of the pressure inside a popcorn kernel, water does not vaporize at 100C. Instead, it stays liquid until its temperature is about 175 C, at which point the kernel ruptures and the superheated water turns into steam. How much energy is needed to pop 95 grams of corn if 15 percent of a kernel's mass is water? Assume that the latent heat of vaporization for water at 175C is 0.90 times its value at 100C and that the kernels have an initial temperature of 175C. The part in bold is what I don't understand.

What does Iso- and Neo- mean in terms of naming organic compound. can you give some examples. thank

Hi again, I am writing a Chemistry report once again and I need some assistance from you. I am having trouble on answering some of the questions. Questions: 1) Why is acetylation of the amine group useful in organic synthesis? 2) Explain why the amine group and its acetylated derivative are ortho/para directors. 3) Aniline cannot be nitrated directly with the usual nitrating mixture of the nitric acid/sulphuric acid because considerable charring takes place. Write equations to show how you might prepare p-nitroaniline from aniline. I have searched around 'Google' but couldn't find anything. Thanks for your help. Dc Nilbog Problems solved. Tha…

hey guys, my mums just gotten into uni, and we're having some difficulty find credible sources for one of her Essays. Any help would be greatly appreciated. The question is: what is meant by the term 'Modernity and what are the main features said to characterize 'the great transformation giving rise to modernity?' All sources need to be referenced thats another factor as to why we're having some issues..as most pages Google returns are not. We've had a look on recommended uni pages, but they are turning up limited results. They're not user-friendly...and even I'm having some difficulty finding results. So I logged onto here cause I know you guys are awesom…

Just been doing some work on acids and bases. I know that when you react an acid with a metal oxide you get a salt and water being produced. But a question I have asks for the equation when you mix lead sulfide and hydrochloric acid. Will you get lead cloride (the salt) and hydrogen sulfide produced? PbS(s) + 2HCl(aq) -----> PbCl2(s) + H2S(g)

Which of the following can you conclude about a particle labeled ? Check all that apply. A. It has one electron. B. It has one proton. C. It is a beta particle. D. It has one neutron. E. It has one nucleon. F. It is an alpha particle. G. It has no neutrons.

what is the alternate method of two point and three point test cross in bacteria?

Hi all, Iv been having real difficulty in finding information on the following question: Q) What are the mechanisms for surviving extreme temperatures in animals, plants and microorganisms. Does anyone know any websites where i can find information on this and any suggestions or answers to the question will be appreciated. THANKS...

I dont really know where to post this so I decided here coz I need help.. Hi, i'm doing my investigative project at school. I have read that the Ancient Romans used urine to clean their clothes so I came up with this idea; to make a laundry detergent with urine as a main component. My problem is how would I make one? I prefer having powdered detergent but liquid detergent might work too. But my problem is what would I mix with the urine to make a detergent..? That's all.. Thank you for those who would help.