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what is the longest natural food chain?

hey guys...i'm trying to revise for my cell physiology exam next week and am completely stuck on this guaranteed question to come up. please guide me in the right direction if you can. ok so basically this is the question: "Assume the ratio of extracellular sodium concentration to the intracellular sodium concentration is 100:1. Calculate the ratio of the intracellular to extracellular glucose concentration that one might expect to be achieved where (i) 1 sodium ion is transported along with 1 glucose molecule and (ii) 2 sodium ions are transported along with 1 glucose molecule in those circumstances." now i know that because its a cotransporter the glucose i…

Good afternoon, Hopefully someone could point me in the right direction. I need to build a Cathode Ray Tube for my Chemistry class and truthfully, I have no idea where to begin. I understand the concept but I can't find a website that shows exactly what materials to buy and how to put them together. I've found several websites that show CRT's but none show a step by step process on how to build one. I am looking to build a relatively simple CRT. Any comments or ideas? Thanks,

I have a question from class that says to name the two electron transporters in the Electron Transporter Chain? I am having a hard time understanding the whole krebs cycle/ETC process. I thought the answer was NADH and FADA but the teacher said that wasnt it. Any help would be great.

I've been trying to solve this question, but I have no clue where to start from. Someone help me out please. question 1... pure (s)-amphetamine has a specific rotation of +37.6 degree. If a mixture of (S) and ® emphetamine has a specific rotation of -21.0 degree, Calculate the percentage of each enantiomer present in the mixture. question 2...The reaction of molecular chlorine(cl2) with an excess of ®-CH3CHClCH2CH2CH3 will produce _______ products, including stereoisomers. Would it be 7 products? Also, how many of the products from that reaction will be optically active?

How to Measure magnification How can I see how strong a magnifying glass is? I bought this magnifying glass http://www.liangdianup.com/inventory/189901.htm and I want to know how to test it to see how strong it is. I hear a lot of people talk about magnifying and how strong the magnification is, but I would like to know the true magnification of my magnifying glass. I have a few of them and some seem stronger then others. How can I rate these? How can I pin a correct number on mine? How do the companies that make these come up with these numbers.

I wanna know the lewis structure of these two ions: 1-thiosulfate 2- tetrathionate thank you in advance

I have to write a paper and here is the rough draft. I could use help in any glaring errors with data, not so much anything to do with grammar. I have ommitted citings of any material currently as I am just trying to get down how I want it to read and look. Any responses would be appreciated. --------------------- Quantum mechanics is a theory produced by the scientific field of physics. Quantum mechanics or QM for short is a complex mathematical formalism used to predict physical behavior on a microscopic scale primarily, though it has application to the entire observable universe. The mathematical formalism is the mathematical framework by which QM gets experim…

where can I find what [Ag(NH3)]2SO4, [Cu(NH3)2]2SO4, and [Ni(NH3)2]2SO4 are used in? I've read a line that they can be used in explosives, but I have not had much success in finding anything else. Ive just been doing the search on google and yahoo, is there a better place to search? Or do you know of reactions I could read on to find out? Thank you for reading, hope you can help.

Hi all, I have a question relating to food poisoning which im hoping someone can help me with. Im trying to answer the following question: Describe, with reference to journal literature, how food poisoning bacteria are able to survive and/or proliferate in foods. The answer must convey a recognition and understanding of: * the influential factors within foods which influence the growth and survival of microorganisms * relate these factors to the growth of specific food borne bacterial pathogens * use information from journals (at least five references published within four years) to effectively explain the relationship of environmental factors and the …

The admissions office at State University wants to develop a planning model for next year's entering freshman class. The university has 4500 available openings for freshmen. Tuition is $8600 for a local student, and $19200 for an overseas student. The university wants to maximize the tuition fees it receives new year. By state mandate, it can admit no more than 47% overseas students. Also, each college in the university must have at least 30% local students in its freshmen class. In order to be ranked in several national magazines, it wants the freshmen class to have an average SAT score of 1150. Following are the average SAT scores for last year's freshmen class for …

Hi all, my daughter hsa been asked to solve the following The planet Neptune has a mass of 1.028 × 1026 kg and a density of 1.61 × 103 kg m–3. Use this information to calculate the volume of Neptune. Volume, , is given by m volume= --- p where (m) is mass and (p) is density. You should give your answer in scientific notation to the appropriate number of significant figures and with the correct SI units. Many thanks carl1

This is a question I have for my lab report "Determining the Enthalpy of a Chemical Reaction". I feel like the answer is probably right in front of my face, I just don't know how to start. The first data analysis problem was to find q of each reaction, which I was able to do. Then it instructs me to "calculate the enthalpy change, ΔH, for each reaction in terms of kJ/mol of each reactant". I understand what enthalpy is, for the most part, but I don't really know what to do. You find the enthalpy change for a reaction as the enthalpy of the products - the enthalpy of the reactants, right? But I don't know how to calculate the enthalpy change for each reactant…

de Broglie's equation which has a larger wavelength, a slow-moving proton or a fast moving golf ball

I've tried to find the answer but can't seem to get it yet. Here is the question: For what values of 'a' will the tangents to the parabola [math] y^2 = 4ax[/math]from a point not on the y axis will be normal to the parabola [math] x^2 = 4y [/math]? in case this help the answer is [math] a < -2 \sqrt[2]{2} or a > -2 \sqrt[2]{2} [/math]. sorry for this repost. Does anyone know if I could delete it. thanks for deleting the other one

-------------------------------------------------------------------------------- Hi all, a richter scale is based on powers of ten, which means that an increase of one unit on the scale implies a tenfold increase in ground motion. ie: a mag 2 earthquake produces 10 times more maximum ground motion than a mag 1 quake. A mag 3 quake produces 10 times more again, which is 10 x 10 =100 times greater ground motion than a mag 1 quake. so my question is:How many times greater ground motion of a mag 7 compared to a mag 5. Would i be in thinking the anwser would be 200 or would it just be a 2. (ie: the difference being a mag 2) thanks carl1

In a cell biology lab we tested the rate of SDH activity in cauliflower mitochondria. We did this by mechanical disruption and centrifugation. We obtained a mitochondria fraction as well as a mitochondria-free fraction. We then blocked the electron transport with the poison sodium azide. We then added a dye, DCIP, that acted as an electron acceptor. We measured the color change in the dye with a spectrophotometer as it accepted electrons and used these values as an indirect measure of SDH activity. The mitochondria fractioned showed a lot of SDH activity while the mitochondria-free fraction showed a little. My question is where were the free electrons coming from in …

Your friends are starting a security company that needs to obtain licenses for n different pieces of cryptographic software. Due to regulations, they can only obtain these licenses at the rate of at most one per month. Each license is currently selling for a price of $100. However, they are all becoming more expensive according to exponential growth curves: in particular, the cost of license j increases by a factor of rj > 1 each month, where rj is a given parameter. This means that if license j is purchased t months from now, it will cost 100×rtj . We will assume that all the price growth rates are distinct. The question is: Given that the company can only b…

I am stuck on this: Determine whether f: [math]\mathbb{Z} [/math] [math]\times[/math] [math]\mathbb{Z} [/math] [math]\rightarrow \mathbb{Z}[/math] is one if [math]f(m,n) = m^{2}-4[/math] it would be graet if anyone could give me a push in the right direction. [EDIT] I think I found the answer. This is not a Relations question [math]\mathbb{Z} [/math] [math]\times[/math] [math]\mathbb{Z} [/math] [math]\rightarrow \mathbb{Z}[/math] is a binary operator (+) So the answer is "no". Right?

The singles portion of a tennis court is 27.0 ft wide and 78.0 ft long. a. If a serve is measured at 185 km/h, how many seconds does it take for the tennis ball to travel the length of the court? (length of the court in meters is 23.8 meters.) b. How many liters of paint are needed to paint the court if 1 gal of paint covers 150ft^2? ------------------------- Serving size 0.50 oz (6 crackers) Fat 4 g per serving, Sodium 140 mg per serving a. If a box has a net weight (contents only) of 8.0 oz, about how many crackers are in the box? b. If you ate 10 crackers, how many ounches of fat are you consuming?? ----------------- I just need to know how …

I am working on Taylor Series and I believe one of the derivatives in the solution manual is wrong. I am taking the derivative of [math] f(x) = \frac{x}{(1-x^2)^{(3/2)}} [/math] I believe it is: [math] f'(x) = \frac{1+2x^2}{(1-x^2)^2} [/math] but the answer key says it is: [math] f'(x) = \frac{1+2x^2}{(1-x^2)^{5/2}} [/math] Can you check my math please.

I was given the following problem description for a depth-determination problem, however I am completly unable to figure out how this "pseudo-distance" feature works, if anyone has any clues and can provide a uber-simple example it would be much appreciated - I just can't see how it works/applies. [Problem] In the depth-determination problem, we maintain a forest F = {Ti} of rooted trees. We use the disjoint-set forest S=Si, where each set Si (which is itself a tree) corresponds to a tree Ti in the forest F. The tree structure within a set Si, however, does not necessarily correspond to that of Ti. In fact, the implementation of Si does not record the exact parent…

Does anyone know of any kind of simple way to make a sort of ice sampler? I have to make one that collects ice, and I'm not quite sure where to begin. If anyone has any ideas, I would be eternally grateful!! Thanks!!! Theresa

Why do people drive worms out of the ground with electricity? i'm stumped!

i dont have my periodic table