Recent content by dgoudie

Homework Statement "Supposing that at perihelion a comet is 1 Au from the sun and its speed at that point is 200km/s( in a frame of referance in which sun is stationary). Find its mean PE and KE to one sig digit. Does it satisfy the virial theorem? Homework Equations K= .5mv^2 U=-GMm/r...

Hmm, well the Computer accepted my answer for part one, but it does give a bit of error room. Well I just maxed out all my tries, but thanks anyway. I'd still like to understand how to do it for future reference. my last try was 125/84.7 which didnt work :(. The next question was all about...

The Req you mention, is that just for loop ACDB? or for the whole circuit? The one I tried was the whole circuit so maybe that's where I went wrong

Homework Statement R1=17.0, R2=84.0 , R3=24.0 http://capaserv.physics.mun.ca/capalibrary/Graphics/Gtype1021/A5Problem27.gif The first question was find the Req across AB, I got that to be 82.0 ohms, which the computer said was right, Next question is : If VAB = 125.0 V, what is the current...

I have a table of time values and speed values, that I want to plot in Mathematica. WHats the easiest way to plots these one vs the other? Should I turn them into Lists first? :S

Thank's I figured it out

My Prof wants the Integral to 20 decimal places. where do I specify that with NIntegrate?NIntegrate[f[x],{x,0,3}]Thanks in advance

[SOLVED] Level Curve Homework Statement For the given equation sketch the level curve F(x,y)=1 F(x,y)= x^2-y^2 Homework Equations The Attempt at a Solution Would this: x^2-y^2=1 still be a circle? What will the minus change?

[SOLVED] Electric Potential Homework Statement 20. [1pt] A 30.6- cm-diameter conducting sphere is charged to 538 V relative to V = 0 at r =infinity. What is the surface charge density sigma? Correct, computer gets: 3.11E-08 C/m^2 = Sigma, r=.153 21. [1pt] At what distance will the potential...

[SOLVED] Activation Energy related to rate. The activation energy for the reaction : 2N_{2}O_{5} (g) \rightarrow 2N_{2}O_{4} (g) + O{2} (g), is 103 kJ/mol. The gas constant is 8.314 J/mol*K Using only information given in this problem calculate the temperature at which the rate of the...

yeah I think I'm doing vector calc next year. I am doing Calculas III now. Series and sums and stuff. we do double integrals in a month or so I thin, ill probbaly understand better than. thanks for you help

.2 was k times A. its not your explaining that's the problem, we did no questions like this and there are none in the text. I got the right answer now thanks for all your help! know any place I can do some supplimentry reading on this subject? my textbook sucks

So does this integrand look right or is there no dA involved? sorry for bothering so much. \int^{a}_{0} 0.2y dA

0 and .250? over y?

i'm not sure. I know z times y will be the area with z constant and y changing. edit is it: \int_{1} E*dA + \int_{2} E*dA