Recent content by ombudsmansect

OK for anyone interested what i did in the end was made comb logic for the 4 MSB's when they are above 1010 high output, then ANDed that with and OR for both when 1010 and the second set of 4 bits that were below 0111, and when the MSB's are 1010, second 4 0111, and the 4LSB's below 0100. Yeah...

Comparator was used to create the 12 bit signal, now i must use the 12 bit digital signal to illuminate an LED when the analogue input is >6V. Combinational logic must be used to illuminate the LED, it is all i am able to use. No comparator available for this part of the circuit. I am...

I need to use combinational logic to produce a high ouput for a certain range of values. I have and anaolgue signal which i have converted to a 12 bit digital signal, I need an LED to be turned on when the analogue signal is above a certain voltage. I have the digital value (101001110100 =...

hey guys thanks for your help, it most certainly was an integrating factor as you say, some careless differentiation there on my part. Worked out very nicely in the end with k(y) as 0 so the answer is just 4/3 x^1.5 + 2x^1.5y^3 as you have stated there hallsofivy. thanks again guys

hello again halls thanks for looking again, I have run through the process to find an integrating factor and it gives me 1/sqrtx. This is also an intuitive guess at an integrating factor but it still yields a non exact solution, even though the formula specifically yields this answer. With...

Thanks HallofIvy, Turns out it was correct, it was a multiple choice question and it turns out the program was so wrong it didnt even have the answer listed. Cheers

Hey guys was wondering if anyone knew what the go is with linearly dependent solutions to test for exactness, by that I mean I have the differential equation (2x + y^2)dx + 4xydy = 0 (M,N) So i test for exactness and \partialM/\partialy = 2y \partialN/\partialx = 4y So I...

ODE solutions :( hey guys, I am attempting to prove this: Verify that y is a solution of the ODE. Determine from y the particular solution satisfying the given initial condition. y' = 1 + 36y^2 , y = (1/6)tan(6x+c) y(0) = 0 It can be seen that it is a solution I then...

Homework Statement 1 The density of copper is 8930 kg m-3, its mass number is 63.55 and its atomic number is 29. a) Calculate the mass of a copper atom in kg. b) How may electrons and protons does a copper atom have? c) Estimate the diameter of a copper atom...

lol! de ja vu frm reading that lol, well i used (pi) integral of (f(x))^2 dx and got the correct answer so all looks well. Thanks heaps again u r really good at helping ppl saved me twice tonite already! have a good one suz :D

hmmm perhaps all i need is (pi) integral of (f(x))^2 dx, ill give it a shot and see what happens

hey :) Is ther really a calculus bible online?? lol but i can't find it in my textbook and all ones i find online are specific to certain shapes but I am sure that like the third integral or something like tht hsould do it. I can find the area under the curve then i know i have 2pi degrees of...

Homework Statement Find the volume of the solid generated where y = 1/x for 1<=x<=5 is rotated about the x axis. Homework Equations I = r^2 dm, sqrt(1 + (dy/dx)^2) dx, The Attempt at a Solution So I have found the length of the curve and can henceforth find surface...

thanks suz! i will try n crack this thing now :D

Homework Statement find the integral of (1 + 2x)/(1+x^2) Homework Equations The Attempt at a Solution I honestly have no idea how to solve this and have spent ages trying to figure it out. I would automatically assume using partial fractions to solve but the denominator presents...