Undergraduate Integrating an ODE

Hi, I'm really struggling with a question to do with integrating an ODE. Here is the question: Solve the problem dy/dt=y-t^2+1 y(0)=0.5 What I need to do is basically solve the ODE. When I have got y on it's own, I need to substitute in y=0.5 and t=0 to find the value of c. I was told that I needed to do this using the Integrating Factor...

Undergraduate Integrating Dirac Delta Function (simple question)

I'm just going over this exam question It's pretty straight forward but I'm getting a conflicting answer with the mark scheme (which I think may be an error) The delta function centres at x = 5 so substituting that in you should get f(5) as the delta function 'filters' to f(x) when integrated. However the mark scheme is showing 5.f(5), pu...

Sixth form help with a mymaths question-differentiating polynomials

i have already looked at the lesson but still struggling with this question. can someone please help me through the working for question 2 part b?...

Undergraduate Help with basic mass balance

Hi guys, I'm not sure if this thread belongs in this forum but its for chem eng. I'm struggling with basic equation rearranging to find unknowns. I have an example question that says.. A mixture containing 40 mole% heptane and 60 mole% octane is to be separated in a distillation column operating at a pressure of 1 bar. The feed will be li...

Sixth form Math 2012 June AQA - last question help needed

Question C ii and iii of this question. I'm really struggling to understand how the stretch works on the first bit, and though I got the right answer for the x cord = 1/3 .. I couldn't figure out how to get the gradient into the form asked for.

iTunes Search API in Rails

Does anyone have experience integrating the iTunes Search API into Rails? I've started off by using the itunes-search-api gem, but I'm very new to Rails and when the documentation says: ITunesSearchAPI.search(:term => "The Killers", :country => "US", :media => "music") ITunesSearchAPI.lookup(:id => 284910350) I'm not sure whe...

Undergraduate C3 Solomon paper Question

Hey I found I got a question wrong in the C3 paper C, question 2b. Here is the question: Find the values of θ in the interval 0 < θ < π such that cosec θ − sin θ = 2, giving your answers to 2 decimal places. The answer gets a quadratic: sin^2(θ) + 2 sin (θ) − 1 = 0 How did they get from cosec θ − sin θ = 2, to the quadratic? many thanks...

Undergraduate Emergency Equity law help?!

Hi, I'm just wondering if anyone could help me out here. I've been given a question as an assignment and I don't understand what the question is even asking about, let alone the subject matter. The question is: To what extent can it be said that there is a unifying underlying theory in respect of the principles governing the law in relati...

Undergraduate Taylor's theorem approximation

1 Consider the function y = f(x) = x 1=2 ; x > 0 and considering only f(x) > 0: (a) Find the second order Taylor series approximation around x0 (ignore all terms higher than the second order). (b) Show that if you use the approximation in (a) then using the di§erential dy = f (x)dx to estimate the impact on y of a change in x of amount dx...

Undergraduate Analysis Q

Hi guys, The question is to prove the sum of (1/k) from k=1 to n-1 is greater than or equal to log(n). Preceding the question they asked to state the ratio test... so that might be needed but I don't see how. Also, you are given a hint: log (1 − x) < −x for 0 < x < 1. I've tried induction but I haven't gotten anywhere, any help is appreci...

Undergraduate Chain rule on cartessian and polar coordinates

I get stuck on the part where it says "show that". The beginning of the question took me around 45 mins and I was wondering whether the rest of the question will follow easily. Thank you for your time...

OCR OCR A2 English Literature exam 2013 - comparative question?

People taking this exam in June - how would you go about answering the comparative question? I'm currently doing a practice question on the theme of pride (SO hard) and I'm really struggling to come up with a way to set out the essay. Does PEEL still apply, or is there a different way to organize paragraphs? Basically - how on earth do yo...

Undergraduate Statistics Help on Probability

I am struggling on a Probabilty question about paint being applied to cars. The table needed is as follows: _____________Mean ____Standard Deviation Primer_________3.7__________1.2 Undercoat______3.9__________0.9 Top Coat_______4.0__________0.75 (I hope it is easy to follow) My questions about this are: 1. How do I find the total amount o...

I need help for student finance england.

Hello friends, I would like to ask very important question about student finance. I did my undergraduate in 2006 from india. I have ILR I am just wondering can I apply for student loan because my friend told me they dont give student finance if you have undergraduate degree. I also applied for year 2 because I am hoping my university will...

Sixth form Integrating (with imaginary numbers)

I want to integrate i.e^x.sin(nx) where n is a number I've treated i as number, and taken it out whilst integrating, I've attached my calculations. The correct answer is: [i.e^x (-(nCos[nx]) + Sin[nx])]/(1 + n^2) The denominator I get is: (i + n^2) and no i in the numerator.. I cant seem to figure out where i've gone wrong, if you could p...

Undergraduate differentiation of a definite integral

By applying the method of differentiation of a definite integral to show that: (i) There is a second question, but I am unsure of how to solve this, so I would appreciate any guidance so I can attempt the second question myself. Thanks :).

Undergraduate Differential Equation - Number Theory extension

Hi guys, Question is above. I've solved the difference equation fine - I am however stumped on the last part. It's quite strange to find something that resembles number theory in a DE question! Any ideas on what to do is appreciated. Thanks.

Undergraduate Quick question about open and closed surfaces

Hi, Quite a generic question but if I am given an open surface, how can I/should I modify it so that it is closed (so that I can use the divergence theorem on it for instance)... the surface in question is '1-z = x^2 + y^2' for 0=...

Sixth form A2 History coursework (The New Deal)

I'm new here guys and I need your help badly. My question is 'Assess the view that it was the second new deal and not the first that represented Roosevelts major domestic achievement' The question itself is not to difficult but its the source finding and how to actually answer it that I am struggling with. Would really appreciate some hel...

Undergraduate Introduction to a software implementation Evaluation.

Hi there I'm struggling a bit with my evaluation especially the introduction part. I'm not quite sure how I would start it off. I'm writing a report of a mobile application I created for my dissertation and i'm currently at the evaluation stage. How would I start this off?...

Undergraduate simple modular question

Hi, I have a question about modular arithmetic. I have done barely anything to do with modulars before, so im sure there's a simple answer to this, but im a bit confused to why the following : a = (k(p-1))(q-1) + 1 means a = 1 (mod q - 1) and similarly a = 1 (mod p - 1)...

Sixth form How do I get an A in the 25mark question in a politics exam paper ??

I'm struggling a bit and could do with some help or advice. My exam is in may and I find my weakness when it comes to the 25 mark question. Has anyone got a good structure that could be useful ? Posted from TSR Mobile...

Undergraduate Land law - Severance

I understand the the methods of severance from Williams v Hensman (I know this only applies to a Tenancy-in common). However, I am struggling to understand how a joint tenancy can be severed? Answers on a postcard please! ;-)...

Undergraduate Expanding Italian vocabulary

Hey, I'm studying ab initio Italian and i'm really struggling with expanding my vocabulary. Are there any simple news sites ( equivalent to lemonde.fr) but in Italian? Or does anyone know any good resources that could help me? Thank you...

Undergraduate Limits

Someone please help with understanding this... The answer is no, no and no. I get why it's no to the first question but not Why its no as well to the other two questions Posted from TSR Mobile...

Integrating ShareKit 2.0 in IPhone App

Can any one tell me that what I'm doing wrong while integrating the newly SDK Sharekit 2.0 in my App, I downloaded the sdk from the " git://github.com/ShareKit/ShareKit" , and following the instruction for installation and integration from the https://github.com/ShareKit/ShareKit/wik i At the end when I build the program so it failed and g...

v150 Integrating Aramex APIs (shipping) on my site in UAE

We developed a zencart powered ecommerce store in UAE. We are looking for some help in integrating the Aramex Shipping APIs for the same. Kindly help in this matter. a modules would be appreciated. More information about Aramex APIs are http://www.aramex.com/developers/aramex- apis Already had a contract with Aramex company.

Cardiff University Scholarships for Undergraduate Students in UK, 2014

Cardiff University is offering undergraduate scholarships for UK students. The Scholarships are available to undergraduate students beginning their studies in .. [Read Full Scholarship Detail]...

Undergraduate dont get this question

6. the probability density function of the net weight in pounds of a packaged chemical herbicide is f(x)= 2 for 49.75...

Undergraduate Land Law - Easements

Hi, I am struggling to find any information on easements passing with the land or passing from a previous owner to a new owner of land. Does this happen or must the easement be created again using the usual rules of the acquisition of easements? Any help would be great, thanks, Tom...

Undergraduate Judge and Jury Law of Evidence

A good and extensive understanding of the role of Judge/Jury in criminal trials. The above question is for the Law of Evidence. Has anyone ever attempted this question and received a decent grade? 2:1 This is one of the questions, an hour for each. Any good resources, apart from Adrian Keane? Thanks in ad...

Integrating Post Web Services in Blackberry app

I am very new Blackberry App Development and facing a big problem in integrating Web Services in my Blackberry app. I have to use Post Web Services in the Application and don't find even a single tutorial which explains how to integrate the Web services in Blackberry. Please some one help in this regard. I executed the example give at thi...

Sixth form Integrating and differentiating trigonometric functions HELP !

Hi mathematicians I need some help Integrating and differentiating trigonometric functions. Can someone explain the rules for me. Thank you...

Undergraduate Group theory question

Hi guys, This has been bugging me for a while. So consider groups of order 6 - |G| = 6. In my notes I have that these are either C_6 or D_6. However, take a e G, b e G with o(a) = 2, o(b) = 3. Then isn't: C_2 x C_3 = x = {e, a} x {e, b, b^2} = {e, b, b^2, a, ab, ab^2} isomorphic to D_6 and hence G?? In fact even more-so, isn't C_2 x C_3...

Undergraduate Help with Call option (ND1 Calculation)

Hi guys, Im doing some revision around call option valuations and im struggling with the calculation for Nd1+2. I can figure out d1 + d2, and i know that i need to use the distribution table to get my figure e.g. Nd1 = 0.05 - _____. but i don't know how to go about finding out which figure. Any help would be much appreciated Thanks...

Undergraduate Questions on prime numbers

Hi there, I'm really stuck with these two questions despite having been given a few hints. It's question 4 and 5 of this sheet: https://www.dpmms.cam.ac.uk/study/IA...u mset12012.pdf For question 4 I've been told that you can generate a set of non-primes using two consecutive primes e.g 5 and 7. Then 2*3*5=30.....Sequence 32,33,34,35,36 wi...

Undergraduate Convergence of integral

For what values of c does integral from 0 to infinity of f(x) converge, where f(x) = x^c / sqrt(x^2 + x) I really have no idea where to start with this question and would appreciate some help! Thanks a lot...

Undergraduate Relativity

Just revising over some stuff and came across a question, I was given the line element for the spacetime(unimportant for my question) and I had to work out the geodesic equations. I wrote out the Lagrangian and worked it all out but when I checked the answer, I had done it wrong. I've attached the part that I got stuck on, can someone tel...

Sixth form C4 Integration question

thanks i advance for all the help offered. what would be the answer to the follwing: integrating : integral sign (with 1 on the top and 0 on the bottom) x (2+x)^3 dx and appearently we have to do subbing but the sub is not given (i.e. u= ) i got as the answer 3/10 but answer on the backo of the book is 9.7...:(

Alternative student loans undergraduate college loans

Bank of North Dakota (BND) Student Loan Services DEAL Loan : Alternative loan for undergraduate students and high school students participating in dual credit programs.. .. need to know about college student how to get out of student loan debt .. An alternative student loan is a credit-based loan made in the student s name, available for...