Recent content by need_aca_help

Thank you @HallsofIvy and @Simon Bridge for both really helpful answers. Unfortunately, I am still am having some trouble understanding though... :( For clarification: Question: Find a vector equation for the line through the points A and B A(0,10,-3), B(-4,18,-5) Since I have to...

Could someone please explain when to minus the vector 2 with vector 1? This is what I found in the course book: Example 1: Find a general equation of a line in R2 that passes through the point (2,3) and is parallel to the vector (-3,-2). (x,y) = (2,3) + t(-3,-2) For the vector equation, this...

Yeah I thought the "a" from the question meant the vector A not "a" as for the question "a". Dumb mistake. No wonder why I couldn't solve it.

Homework Statement In this question we consider the following six points in R3: A(0,10,3) B(4,18,5) C(1,1,1) D(1,0,1) E(0,1,3) F(2,6,2) a) Find a vector equation for the line through the points A and b b) Find general equations for the line from a c) Find a vector equation for the...

A few weeks ago I heard that Intel released 14nm CPU (Broadwell). After that I did some research and found out that by 2020s we humans will have 5nm CPUs and that will be the end of Moor's law according to Bob Colwell. My question here is at what scale does the quantum mechanics kick in and...

I managed to solve the problem, using this equation: E = 1/2QV E = 1/2Q(kQ/r)

Energy stored by a charged sphere

I found this equation from the textbook. u = 2keQ2 / R Using this I get 50 = 2(9X109)Q2 / 0.18 0.18(50) = 2keQ2 Q2 = 9 / 2k Q = square root (9 / 2(9X109) Q = 2.23607 X 10-5 2.24X10-5 C But this isn't right...

VT = 2(kQ / r) = 2(20700 / 0.8) = 2(25875) = 51750 51750 V Is it right? Edit: Nope its wrong...

Yes electric field has a direction and a magnitude... But its not helping me understand what is going on... Could you please explain it little further?

My guess is that electric field strength has a direction?

Using E = F / r2 I get zero when I add them up since for the distance I have to use negative for one of the charge. For electrical potential V = kq / r, I also get zero if I add them of since one of the distance is negative.

Symmetry...? Not sure how to do that...

Is the electric field strength and the electric potential also going to be zero?

Homework Statement Calculate the equivalent capacitance between points a and b in the figure below (C1 = 4.10 μC and C2 = 1.60 μC). Notice that this system is not a simple series or parallel combination. Homework Equations Series: CT = [1/c1 + 1/c2...]-1 Parallel: CT = C1 + C2... The...