Recent content by brunie

Hi, I was doing a few homework questions and I came about a few ODEs of this form. For example, (XD^3 + 4D^2)y = 8e^x Im not sure what the D stands for, is it a constant, is it a derivative of y (ie. y'''), etc. ?? In the same section of problems there were questions that I solved...

A long straight wire lies on a horizontal table and carries a current of 2.00 µA. In a vacuum, a proton moves parallel to the wire (opposite the current) with a constant speed of 1.90E4 m/s at a distance d above the wire. Determine the value of d. You may ignore the magnetic field due to the...

ok yes that makes sense thanks for ur help

so (2x)^2007-k isn't equivalent to (2)^2007-k * x^2007-k ??

Hi, Im having some troubles with this binomial expansion... Determine the coefficient of x^k, where k is any integer, in the expansion of (2x - 1/x)^2007. I figured it would just be C(2007,k) * (2x)^2007-k * (-1/x)^k = C(2007,k) * (2)^2007-k * x^2007-k * (-1/x)^k therefore the...

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hmmmmmmmmmmmm

A uniform electric field of magnitude 270 V/m is directed in the positive x direction. A +13.0 µC charge moves from the origin to the point (x, y) = (20.0 cm, 50.0 cm). (a) What is the change in the potential energy of the charge field system? ____ J (b) Through what potential difference does...

fyi, i was right, the equation has to do with fnet = ma where fnet incorporates magnetic force so next time if u don't kno wut ur talking about please don't answer a question for sum1... instead of saying ok wut u said might make sense u overcomplicate everything

so is there a way/formula to solve for acceleration by knowing this?

i assume so

so if we know it is coming out, how does it help solve for acceleration?

?

but wouldn't using the RHR in this case introduce the 3rd dimension, because it would be coming out ?

well i kno initially its moving at the angle of 44˚, but the magnetic field should affect it to move in the positive y direction i think