Recent content by JFonseka

Nvm, problem(s) solved.

So does this mean that I have to multiply 4.9 by 1.6x10^-19?

Homework Statement Two charges, q1 = 4.9 e C and q2 = -3.6 e C are located 105nm apart, what is the size of the force between the two charges?Homework Equations F=kqq/r^2 The Attempt at a Solution I did it according to the formula and I got the answer wrong, so I checked it using an online...

Hey tiny-tim, Thanks a lot for your time and help with my problem =) Cheers

tinytim thanks for your answer, though it's confusing I got that exact same fraction using an online calculator but that answer seems weird for an exam question. And no, typing 3.14159 won't make it 22/7, because it's not exactly that. Suppose there was some answer that came out to something...

On scientific calculators there is that fraction button that converts decimal numbers to fractions, however for this particular number it won't do it, either because it needs more decimal places to figure out a proper fraction or because it's not possible at all. It's part of a question from a...

Yes, thank you for your valuable contribution. Go do something that's more constructive than wasting time irritating others with useless answers.

Homework Statement arctan(sin((3 / 4) * pi) * 2) = 0.955316618 I want to express that in terms of a fraction with reference to pi. The Attempt at a Solution I thought of first dividing that by pi itself, and then convert the resulting number into a fraction and tack pi on at the...

So it is a spanning set for V?

Homework Statement Let V be a vector space over the field F. Define what is meant by the statement "For vectors v1, v2,...,vn belonging to V, the set {v1,v2,...,vn} spans V Homework Equations None The Attempt at a Solution Does it mean that the set is linearly dependent?

I never said the Separable ODE approach doesn't work.

The question isn't necessarily wrong, I'm not too good at this stuff at all. It just seemed to me that HallsofIvy was attempting the separable ODE approach, but missed the x^2. I think it should be: (e^2y)*dy = ((-1-x)/(-x^2))*dx (e^{2y})*dy = (\frac{1-x}{-x^{2}})*dx after the separation...

HallsofIvy, thank you so much for your response, that was a lot of help! Sorry about the lack of parentheses.

Homework Statement Find \int\frac{x+2}{x^{2}+2*x+10}*dx You are given that \int\frac{du}{u^{2}+a^{2}} = \frac{1}{a}tan^{-1} \frac{u}{a} + C for a not equal to 0 Homework Equations None. The Attempt at a Solution I'm not entirely too sure how to go about doing this. I first thought of...

I solved the problem using Maple; it gives the answer as y = ln(exp x + 1). So I guess I'm meant to take the log of the entire expression on the r.h.s.