Recent content by engineer_dave

Homework Statement How do u find whether the moment is negative or positive in the three examples shown?? Even if you use the right hand rule, for case 2 i have seen that the moment is negative and not positive. I am taking counter clockwise as positive moments. Please help out. Thanks...

yea i tried that but could u give me the final answer to that particular part. would it 1/2x^-1/2 multiplied by y?

Homework Statement Given z= square root of xy, x = 2t - 1, y = 3t +4, use the chain rule to find dz/dt as a function of t. Homework Equations The Attempt at a Solution dz/dt = partial derivative of z with respect to x multiplied by dx/dt + (partial derivative of z with respect...

Homework Statement Find the general solution of x^2y" - 2y = 0 Homework Equations The Attempt at a Solution Can anyone tell me how to find the general solution of the Euler Cauchy equation. How do we make it into one?? Thanks.

any helpers lol??

yea but this doesn't have an x in front of it

Double integral question... Homework Statement Evaluate the integrals shown ( I have attached the file with the integral). Homework Equations The Attempt at a Solution Ok, for the first one, can you tell me how I integrate sin x^2...?? which method should i use? And for the...

yea i want to change the order of integration so it becomes dx dy. Then what do I have to do?

Homework Statement Evaluate the integral shown ( I have the file with the given integral attached here). Homework Equations The Attempt at a Solution So what i did was change dy dx into dx dy. Then i integrated y so the whole thing becomes 2x - y^3. I plugged the values (1+x)...

Homework Statement Find the general solution of 2y(x^3+1)dy + 3x^2(1-y^2)dx = 0 Homework Equations The Attempt at a Solution So I first grouped the terms with dy or dx 2y/(1-y^2) dy = -3x^2/(x^3 +1) dx after integrating both sides and solving, I got ln (1-y^2)=...

cheers mate. understand it loads better now!

Homework Statement Evaluate the integral shown in the diagram Homework Equations The Attempt at a Solution The first step to evaluating the integral is shown in the diagram (labelled as 2). They said they changed the order of integration. I was wondering what they mean by...

what do u mean it isn't implicit differentiation?

Homework Statement How do u implicitly differentiate (xy)^1/2 Homework Equations The Attempt at a Solution Would it be 1/2(xy)^-1/2 multiplied by 1 and dy/dx. Thanks

Homework Statement Find the mesh currents i1, i2 and i3 Homework Equations The Attempt at a Solution I did it this way KVL at i1: 12 + 1i2 + 1i1 - 1I2 + 10 = 0 KVL at i2: 10 + 1i2 - 1i1 + 1i2 + 1i2 - 1i3 = 0 KVL at i3: 1i3 - 1i2 + 1i3 + 12 = 0 I was wondering...