Homework Help

Hi.I'm new here.I'm in a bit of a mess with my bio teacher.Here's my question-- Say I take a U-tube and fill one limb with pure water and the other with pure alcohol.They are seperated by a semi-permeable membrane.Shall osmosis take place? My teacher thinks it won't but I believe it will.Could you sort it out. Thanks!!!

We've been assigned a science project a few days ago, and we've been looking ALL over the web for a definition on Torsion . is it possible if anyone could give me a few good resources on the topic of Torsion other than wikipedia or another major site, thanks in advance!!

Static problem Three identical cylinders of mass m are arranged in a triangle as shown: The friction coefficient between cylinders is "u1" and between cylinders and ground "u2". What condition must satisfy "u1" and "u2" to remain the system in equilibrium ? Thanks in advance!

g(x) = ln (x-2), x>2 (x is a real number) The question says find g inverse. I have no problem finding the function, but I met difficulty in looking for the domain. The domain of g inverse is the range of g, but I cannot find the range of g, so do we have to state the domain of g inverse?

why does RNA contain uracil instead of thymine, and/or why does uracil take the place of thymine in RNA???? Please help me this is an extra credit problem i need to do to get an "A".

Hi guys? i need help with my scavenger hunt for chem class, its 50 questions, and the items i need to find cant be illegal or dangerous, and you cannot duplicate...please help me! i already have most of these, but just need to verify and get the rest...thanks! 1.Hetrogeneous Mixture 2. Homogenous Mixture 3. An Alloy 4. A 5 ml satured solution of an ionic compound (show all work) 5. pure element 6. picutre of an excited atom ( i got this) 7. a metallic element 8. nonmetallic element 9. a metalloid 10. .300 moles of sodium bicarbonate (show work) 11. an element with +2 and +3 Oxidation states 12. A Pure substance 13. A compound 14. A Hydrate 15. a coval…

A purse at radius 2.00m and a wallet at radius 3.00m travel in uniform circular motion on the floor of a merry-go-round as the ride turns. They are on the same radial line. At one instant, the acceleration of the purse is (2.00 m/s2) i +(4.00 m/s2)j. At that instant and in unit-vector notation, what is the acceleration of the wallet? Can somebody give me some hints on how to tackle this question? What is the relation between the radius of the individual items and their acceleration? I just started on this topic yesterday. =.=

Hey I was just wondering if anyone could help me. I have a space colony project which requires to build a colony on mars. My question is how to create artificial gravity cuz that is 1 of the requirements. I was thinking if my colony was shaped like a donut and there was a giant spinning wheel in the middle there would be enough centripetal force to give artificial gravity to my colony. Also, if please dont give me any ideas that require the colony to be in orbit around mars; I want the colony to actually be on the surface. Thanks in advance:D

Yo, I am a 17 year old student and one day I saw this question in my textbook. "Acids are added to cola drinks to lower the pH to about 2.5 to impart tartness. Show that a cola that contains from 0.057 to 0.084% of 75% phosphoric acid (H3PO4), by mass, meets this pH requirement. " Can somebody explain the "0.057 to 0.084% of 75% phosphoric acid (H3PO4), by mass"? I don't quite get it.

I dont know how to figure out during my reading period, how should i know which words are stressed and not stressed in a poem. Please help me

I need help and info where to get stuff on fast food (for and against). It is due in on 7 june. Any help

Numbering Squares: The numbers 1 to 25 are to be placed on a black and white ( like a checker board) 5 X 5 grid so that each number, except 1, is next to, horizontally or vertically, the number one less than it. (note: all the corners are black squares) a. Explain why the number 1 must be placed on a black square. b. Explain why the numbers 1, 3, 5,7, 9 can not all be placed on one long diagonal. c. Show that in a completed numbering the sum of the numbers on a long diagonal must be at least 33 and that 33 can occur.

Hey guys, My names Leanne I'm in grade 10 in Australia and am searching for an experiment to match my interests in toothpaste. Kinda strange I know. but while I was watching TV last night i noticed that every toothpaste claimed to be the dentists choice. so I want to create an experiment regarding the efficiently of toothpaste compared to each other. The main problem I can see with this is all the variables are going to be really difficult to control. So heres my question how can I create a fairly cheap re-creation of teeth and plaque? I realize that using peoples teeth to actually carry out my experiments would mean that I could come to no certain conclusio…

our choices are as follows: combustions and fuel efficiency prevention of metal corrosion photographic process using silver (Ag) ions voltage concentration of acid cells voltag rate of H produced for electrolysis of salt solutions determining the energy required to deposit 1kg of a USEFULL metal form its salt solution best conditions for electroplting (voltage, concentration, plat surface) determing the reactivity of certain metals ****** this experiment needs to be kept simple as we only have 1 70minute lesson to conduct it... any ideas, or leads to ideas for SIMPLE experiments in this fiels???? the asterisked points are experiments we have already conduct…

Why does the solubility of a solid increase as the temperature of the solution increases? what happens at the molecular level? What property of the solution is illustrated the moment crystals start forming? i have an answer for each but i am not positive...any help would be greatly appreciated. thank you

How do the xylem vessels produced in a tree change with the seasons?

I have found about half of these and I would greatly appreciate help...thanks for your help in advance. 1. Two liquids demonstrating the Law of Multiple Proportions. 5. Compound formed by an alkali and a halogen. 12. Solution of an isomer of CH3-CH2-CH2OH. 14. Ternary compound of an alkaline earth metal. 16. Salt produced by mixing one mole of NaOH and one mole of H2CO3. 17. Glass container with metal that can form amalgams. 18. Any organic compound famous for its "fruity" smell (need chemical name). 20. Emulsifying agent 25. Ionic sunstance whose lattice energy is greater than its hydration energy. 26. Something that would lower the freezing point of water t…

Hi , these were my homework problems: I am keen in maths, but i am just not that good at it please help me. The number 53214 has five digits: 1,2,3,4,5. It has an unusual property. The number 532 is divisible by 4 ; the number 321 is divisible by 3 ; and the number 214 is divisible by 2. a. Show that the number 41325678 , which has eight digits 1, 2,.....,8, has a similar property: its first three digits form a number divisible by 7, the three digits following the first digit form a number divisible by 6, and so on. Let ABCDEFGH be an eight digit number where A,B,C,D,E,F,G,H are the digits 1,2,3,4,5,6,7,8 in some order. For example A= 4, B=1, C=3, D=2, …

im a yr 12 physics student and this year i need to do an eei(extended experimental investigation). i have no idea what to do! last year i chose a really complex experiment and really struggled with it. i want to do something simple, however, something that has lots of physics behind it. i also want something that will have lots of information on the internet. if you have any ideas please let me. thanks

Help!: 1. A 14 g coin slides upward on a surface that is inclined at an angle of 16° above the horizontal. The coefficient of kinetic friction between the coin and the surface is 0.23; the coefficient of static friction is 0.31. Find the magnitude and direction of the force of friction under the following circumstances. (a) when the coin is sliding .03 N parallel to the incline up the incline down the incline (b) after it comes to rest .012 N parallel to the incline down the incline up the incline 2. A 80 kg astronaut and a 1300 kg satellite are at rest relative to the space shuttle. The astrona…

Q1: Calculate the amount of 6M HCl that would be required to neutralize and acidify (to ~pH2) the reaction mixture of 1g Benzaldehyde and 2mL 10M KOH. I think this is the chemical equation: Benzaldehyde + KOH + H+ -> Benzyl Alcohol + Benzoic Acid Q2: 64% yield of 1,1 - diphenylethanol and a 16% yield of biphenyl is isolated from the complete reaction of 1.70g of acetophenone. Determine the masses of the two products. Q3: In the reaction of cyclohexylmagnesium bromine with butanone, the Grignard reagent was prepared from 6.0g of cyclohexyl bromide and was then treated with a solution of 3.9g butanone in 25mL of "wet " diethyl ether (the ether contains 1.0% of …

i am studying vascular plants and i am having difficulty finding the answers to certain questions...can someone please help me out with the the following: what are the special enviornmental conditions a taproot is adapted to? where is the parenchyma, sclerenchyma, and epidermal tissue located? thats enough for now...will probably be more to come please help.

Hello everyone, As an engineering student at the University of Leuven (Belgium), I was given a task to determine the effect of the polarization of laser beams on the maximum cutting speed that can be reached with these beams. I haven't found anything that could help me out on the net, and specialized libraries only had more common books about lasers. So I'd be glad if someone could give me a little information on this subject. I was thinking in the direction of energy contained in polarized electromagnetic waves, but I suppose that's not the only factor... Thanks already, Jan

I can't seem to find what these explanations refer to in my book. I tried internet but it doesn't help either so I'm asking help here. _ _ _ _ _ _ _ _ _ ---> A fused group of cells _ _ _ _ _ _ _ _ _ _ ---> Muscles that work in concert This was in muscle worksheet but way I view it, I don't even know if first one is term in muscle (if it is, maybe I don't know it?). Also, second one made no sense to me. Muscles that work in concert? Is there any other concert that rock 'n' roll concert? Thanks. I appreciate this. It would be great if I can get reply soon.

Ive tried my best to answer please, can someone check it? Physical vs. Chemical Properties 1. Red color - Physical property 2. density - physical 3. flammability - physical 4. solubility - Chemical property 5. reacts with acid to from hydrogen - Chemical property 6. supports combustions - Chemical property 7. bitter taste - Phyiscal property 8. melting point - physical 9. reacts with water to form gas - Chemical Property 10. reacts with a base to form water - Chemical Property 11. hardness - Physical property 12. boiling point - physical property 13. can neutralize a base - chemical property Phyiscal vs chemical change 1. Sodium hydroxide diss…