Homework Help

Does electicity flow from positive to negative or from negative to positive? And Why is the direction of electrical current opposite to the direction of flow of electrons?

Hi, I am a graduate student it Turkey who is trying to finish her thesis. but I really need your help to finish it. There is a survey in the following URL. It is a simple survey takes at most five minutes of you. Also every 50. respondent is going to win an original Ferrari keyring. Please help, I need your ideas http://Turkey.speedsurvey.com

I'm currently taking this subject and I need help looking for cases to write in my journal. I have to pass it by the end of this month. Can someone please help me look for cases online? By cases I meant documented cases in counseling where the counselor has assessed the subject and put in details etc. as to his/her condition, the implications and carried out devices/means to help the subject cope with his/her condition. Thanks in advance.

Hi, I need help with the following questions, any help would be greatly appreciated Find the flaw in the following "contradiction": According to relativity, length (or distance) decreases and time increases as speed increases. Since speed is the ratio of distance to time, however, speed should decrease as distance and time increases In the Michelson-Morley experiment, no interference pattern was found. This meant that both light beams completed the same total distance in the same time. What would be a corresponding result in the boat-river analogy? what would be its signifigance?

The factors for 156 are 1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 156 grouped by last digit {1},{2, 12, 52},{3,13},{4},{6, 26, 156},{78},{39} Fenders are defined as factor enders. For example the fenders (factor enders) of 156 are 1, 2, 3, 4, 6, 8, 9 and that 156 is a 7-fender (that is, it has seven fenders). (Question 1) Show that a number which has 0 and 9 as fenders has at least four more fenders. (Question 2) The smallest 10-fender is less than 700. Find it and explain why it is the smallest.

Doing some revision and I've got a question I struggling with, it's not assessed. I'm having real issues with it: A particle of unit mass moves under a central force in the logarithmic spiral orbit, [math]r=ke^{\alpha \theta}[/math], where k and [math]\alpha[/math] are constants. Given the expression for accleration in plane polar coordinates [math]\bold a = (\ddot r - r \dot \theta^2)e_r + r(r \ddot \theta + 2 \dot r \dot \theta)e_\theta[/math] deterimine [math]\theta (t)[/math and r(t). Derive an expression for the force as a function of radias. My first idea was to differntiat [math]r=ke^{\alpha \theta}[/math] twice, reform it into [math]\thet…

Is there a reason as to why an Alloy can have such a different melting point to its composing metals?

Hi, this is my first post, and I seemed to be stumped on a small thing.. What are some questions that can be answered by a fetal pig dissection? I can't think of any...any help is apprecitated.

Here I am doing a final review for test.... I've got a problem, i'm not sure how to solve these...these are questions 1. How many centimeters are there in 1 yard? 2. Convert 5'11'' to meters 3. Convert 5.2 million square feet to square yards. 4. Convert 5.2 million square feet to square meters 5. Convert 763.04 miles per hour to kilometers per hour 6. Convert 85 kilograms to pounds 7. Convert 16 liters to galloons That's all, just 7 questions....... lol Help would be appreciated, thanks

Hi I got my essay (on Lord of the Flies and Macbeth) topic for my grade 10 english exam, which is tomorrow.: "A belief in a supernatural source of evil is not necessary; men alone are quite capable of every wikedness." - Joseph Conrad At first, I was going to disagree with this since Lord of the Flies and Macbeth have supernatural evils, but I realized the ambiguity of the quotation: If Conrad defines supernatural source of evil as something that's: 1) evil then it's impossible to know every wikedness without believing supernatural evil. 2) not evil then men do know every wikedness. 3) a concrete thing like the witches in Macbeth, then it its p…

Explain what an allosteric enzyme is and how negative feedback works.

hi, In my physics class we use cutnell and johnson physics (fifth edition). My question is do you guys know a website that shows homework solutions? The instructor gave us the answers to homework problems but i have not clue how someof them got that answers. By solutions i don't mean the answers i mean how to do the problems. thanks

Consider the following reduction potentials: Cu2+ + 2e- --> Cu E° = +0.34 V Pb2+ + 2e- --> Pb E° = -0.13 For a galvanic cell employing the Cu, Cu2+, Pb, Pb2+ couples, calculate the maximum amount of work (in kJ) that would accompany the reaction of one mole of lead under standard conditions. Hmmmmm help plz

Hi guys, i was hopeing someone would be able to guide me through this problem. for part (a) i get the transformed equation to be [math] \frac{d^2y}{ds^2}+\frac{4}{s}\frac{dy}{ds} = -\lambda y [/math] i am not 100% sure this is correct, although i have been through the working about 5 times now as for the rest of the question, well, i guess i really need to get part (a) before i can attempt the rest hey? and i don't really get this eigenvalue/vector stuff for functions :S i suppose (a) isnt really my problem, its the rest of the question that is really giving me a hard time! Thanks -Sarah

Trace a molecule of CO2 from the time it enters a plant until it is incorporated into a molecule of glucose or G3P (end of the calvin cycle). Thanks in advance!

A problem from a highschool maths book..... ive been trying to work this one out for years. Mr and Mrs Wombat live in a house in which the floor of every room is a square and covered with identical square tiles. Mrs Wombat's room contains 101 tiles more than Mr Wombat's room. How many tiles does Mrs Wombat's room contain?

Find all two digit-numbers N such that N+2 is also a two-digit number and the digit sum of N+2 is less than the digit sum of N. Help Would be apreciatted. Thank You

Yeah i take Earth Science. and i was asked to compare the geocentric model with the heliocentric model... What???? If you need to know we're discussing over solar system....

hey i am having a bit of trouble with this problem, as the course textbook has nothing on doing these problems using green's functions (all we have is a few slides of dodgey lecture notes)... anyways... the problem.. so to start with, for part (a) now from what i can gather, the BVP has a unique solution if and only if the corresponding HBVP (homogeneous boundary value problem) y''=0, y(0)=0, y(1) = 0 has no solution other than the trivial one, y(x) = 0. i guess then the associated HLDE (homogenous linear differential equation) needs to be solved... so y''(0) = 0 so we look for answers of the form y(x) = Ax + B the…

hi could anyone help me shed some light on balancin this chemicle equation??? MgHCO3 + HNO3 ==> Mg(NO3)2 + H2O + CO2

Hi. For my math class, our teacher gives an assignment which entails finding a website about a subject that we have studied sometime during the semester, and writing a summary/evaluation for it. Since we have done a fairly new outlook on conic sections, one that has actually made them passably interesting, I was hoping to find an interesting website on them. Does anyone have an suggestions? Something along the lines of uses of conics, conics in 4+ dimensions, conics in hyperbolic space, or something else thats a new take on conics. Thanks for your help!

i need help ....... so i chalenge any one to come up with the longest list of energy transfers that they can! i need at least 10+. the first thing must start with the sun thanks for your help:-)

When 391758 and 394915 are divided by a certain three digit number, the three digit remainder is the same in each case. Find the divisor.

(a) Find the largest four digit number having exactly three factors, including 1 and itself. (b) Find the largest three digit number which has exactly ten factors including 1 and itself.

hmmm any ideas how to go about doing this integral (without a computer...)? [math] \int^t_0e^{-\tau} \frac{1}{\sqrt{\tau}}d\tau [/math] i tried Integration by parts but that seems to end up in me going roudn in circles for 5 hours! thanks Sarah