Recent content by physics_197

Nevermind! After running through the code using different values (between 1 and 2), There is no difference in terms of the current... well either, it can be neglected or my code is wrong (I tried entering a large number, that affected the current)

Thank you, I used Newtons method on matlab, I think it should be correct :) Also, do any of you have an idea about the diode ideality factor? I am trying to model a PV module in Matlab and the data sheet does not mention this. I read online that people tend to assume its just 1... Any ideas?

No, I'm talking about just I. So how would I go about finding it?

Also, just a follow up question, the diode ideality constant... Is there a way to solve for it? My notes just say its between 1 - 1.5, Should I just assume its 1? The manufacturers data sheet does not mention a value for this.

Homework Statement I need to find the current, but not sure how to rearrange the equation because of the I in the exp. Homework Equations The Attempt at a Solution Thanks, just need to be pointed in the right direction. Seems like I will either be in ln or exp.

Homework Statement To go from Euler's theorem : to angular velocity as shown: Homework EquationsThe Attempt at a Solution I'm curious how to begin. I can not see the connection! I know w = dtheta/dt, but not sure how to approach this. It has to be more than just differentiate the first...

Homework Statement Pressure altitude of 12km, Ambient temp is 15 celsius above that of the standard atmosphere, cruise mach number is 0.85. Find equivalent airspeed, total pressure at pitot tube, correctly calibrated airspeed, and incorrectly calibrated airspeed (Compression is ignored)...

b2tan2t But I am thinking your looking for something else. EDIT: Never mind, it also equals a2tan2Θ Thanks, got it now :) The next part asks me to show that the area swept out by any angle theta is equal to the area swept out by the same angle (doesn't depend on where it starts). I was...

I thought it was theta because it is A'(Θ). Using t, I get: [ ( a2 + b2sec2t - b2 ) ] * [ (b / asec2Θ ]

( a2cos2Θ + b2sin2Θ ) * [ (b/a)sec2t / sec2Θ ] Then I get it to: [ ( a2 + b2sec2Θ - b2 ) / sec2Θ ] * [ (b/a)sec2t / sec2Θ ]

Have you worked it out? Because I am wondering if my equations are correct. Also, I understand what you are telling me, but I am having some trouble. Should I get everything in terms of t or theta? Other than what you mentioned before, are they any trig identities?

I got A'(theta) = (1/2)[ (acos(theta))2 + (bsin(theta))2 ] and Θ'(t) = (b/a)(sec(t))2 / (1 + (b/a tan(t) )2 ) After multiplying them and using some trig identities i got: [ ab(1+(tant)2) + (b5/a3)(tant)2(1 + (tant)2) ] --------------------------------------------- 1 + ( (b/a) tant )2

When I tried that, I got a complicated answer (it may have simplified down to the correct answer). I was also wondering, Since we are told that A(theta) = the integral of another function, can we just say that A'(theta) = that function?

I'm not sure how to approach this problem to begin with. In earlier parts we were asked to show that tanΘ = (b/a)tan(t) and to find Θ'(t). I have those done and assume we will need to use them. I have tried to integrate the function to find A(Θ). Then, to find A'(t), I though that I could use...

Homework Statement Consider the ellipse r(t) = <acost, bsint>, for t between 0 and 2PI, where a and b are real numbers. Let Θ be the angle between the position vector and the x-axis. a) Recall that the area bounded by the polar curve r = f(Θ) on the interval [0,Θ] is A(Θ) = (1/2) ∫...