Recent content by dangsy

I want to do Medical physics as I feel it is more of a field leaning towards the biology aspect of the physics field.

Just a little bit of backround...I've recently finished my biology major but haven't graduated yet. About 3/4th the way through my bio major I started taking my physics prereqs. Instead of the general physics Bio major were only required to take I decided to take Engineering level physics. I...

Homework Statement \int_0^a x Sin^2\left(\frac{nx\pi}{a}\right) dx The Attempt at a Solution \int_a^b f(x) g'(x)\, dx = \left[ f(x) g(x) \right]_{a}^{b} - \int_a^b f'(x) g(x)\, dx\ \left| x \left[ \frac{nx\pi}{2a}-\frac{Sin\left(2nx\pi\right)}{4a}\right] \right|^{a}_{0}- \int_0^a...

Yes thank you!

yep that's right sorry =(

Homework Statement Determine the probability of finding a particle of mass m between x=0 and x=L/10, if it is in n=3 state of an infinite well.Homework Equations P = \int_a^b\left |\psi\left(x\right)\right|^2 dx \left|\psi\right|^2 = \frac{2}{L}Sin^2\left(\frac{nx\pi}{L}\right)The Attempt at a...

Thanks! Here's what I did... (I don't know how to use latex =/ ) KE = 1/2 mv^2 1 x10^3 eV = 1.602 x10^-16 J 1.602 x10^-16 J = 1/2 (9.1 x10^-31 kg) (v^2) Sqrt[(2 (1.602 x10^-16 J))/(9.1 x10^-31 kg)] = v v = 1.88 x10^7 m/s p = mv p = (9.1 x10^-31 kg) (1.88 x10^7 m/s) p = 1.708 x10^-23 Kgm/s...

Homework Statement The position and momentum of a 1KeV electron are simultaneously determined. If its position is located to within 1Angstrom (Δx), what is the PERCENTAGE of uncertainty in its momentum?Homework Equations ΔxΔp >= h(bar)/2The Attempt at a Solution Δx = 1A = 1x10^-10m Δp>=...

But if the problem gives Volts as in "The stopping potential for the emitted electrons is 0.36 volt" how do I get eV out of this?

so...just to make sure... if I'm given volts I can multiply by e (1.6E-19) to get eV? so 0.36V x 1.6E-19 = 5.76E-20eV? Thanks!

If I took the 0.36V and multiplies by e = (1.6E-19) would that give me an eV? I'm also not understanding your explanation very well, is there any other way to put it? Thanks!

Homework Statement Light of the wavelength Lambda = 5893 Angstrom is incident on a surface. The stopping potential for the emitted electrons is 0.36 volt. Calc the max energy of the photoelectron, the work function and threshold frequency. my question is about the stopping potential...

n . (r->p) = 0 if n is the normal vector ( D in this case I think ) r and p are the points in the plane ( A->B, B->C, C->A) I'm still not understanding how it relates =(

Homework Statement Vectors A, B and C are vectors from the origin to the points a, b, c respectively, and the Vector D is defined as D= (AxB)+(BxC)+(CxA) Show that D is Perpendicular to the plane in which the points A, B, and C lie Homework Equations Cross Product The Attempt...