Recent content by warnexus

I know I stated -a<= x <= a. But x can be positive or negative. How did you know to choose x to be negative? How is cos(2θ)=1−2sin2(θ)? I don't remember this being a trig identity. I am weak in math.

How did you know the integral is zero. Why is psi an odd function?

Homework Statement The solution to the Schrödinger equation for a particular potential is psi = 0 for absolute x > a and psi = Asin(pi*x/a) for -a <= x <= a, where A and a are constants. In terms of a, what value of A is required to normalize psi? Homework Equations psi = 0 for absolute...

q v sin(90) B = m * a..

Yes, Vectors was covered... Oh I see now! Kinematic Equations! Now I know.

velocity would need to be in the y direction

(charge)(velocity sub_z)(magnetic field) = (mass of an electron) (acceleration sub_z)

is that because the direction of velocity is perpendicular to the magnetic field that's why there is velocity build-up? i will try to write one out. (charge) (velocity)(magnetic field) = (mass of an electron) (acceleration_sub z)

well if we start with the z axis, the z axis is the axis that is towards you. there is no velocity in the z, so its zero charge * velocity * magnetic field = m ( acceleration) 0 = m(acceleration) mass * acceleration is also zero

he did teach us how to convert units super fast in the first physics lecture. he really want us to convert units in some assigned problems. but it's for practice which I totally needed but am getting better at. for this one it would be : 90 Gauss * (1 Tesla/10,000 Gauss) = .009 Tesla. okay now...

oh i see. interesting. btw how come magnetic field is given in Gauss, the previous questions that involved with magnetic field were given in Tesla? Wouldn't Tesla have to be used?

i had two semester of calculus: differential and integral. taking 3rd and last semester of calculus in the spring

oh I see. charge* velocity* magnetic field = mass * (d^2 * x)/(d*t^2) may you explain how you got acceleration to be d^2 * x)/(d*t^2). I went through the chapter called amperes law where this question was associated with and don't see the equation like that of (d^2 * x)/(d*t^2) d as in...

F_x is force in the x or force sub x(probably should have done that) you mean like this: F_subx = m* a.. F_subz = m* a..

magnetic force perpendicular to the magnetic field. the y -axis is perpendicular!