Recent content by Craptola

Thanks. So would that make the correct answer (1 sqrt(2) 0)? Or have I completely butchered that. It looks like the plane will never intersect with a'3 making the intercept infinity the reciprocal of which being zero.

I've come across a problem in a past paper while studying for exams, the solution is not given so I can only guess what I have to do, any guidance would be appreciated. Homework Statement Calculate the Miller indices of the shaded plane with respect to the three primitive lattice vectors...

I assumed that the question wanted me to calculate an actual number for the eigenvalue, which is what confused me as it seems that E could be anything depending on other variables. This is all stuff we covered fairly recently so I wasn't sure if there was some kinda law that wasn't in the...

I've been wrestling with this question for a while and can't seem to find anything in my notes that will help me. Homework Statement Determine whether the wave function \Psi (x,t)= \textrm{exp}(-i(kx+\omega t)) is an eigenfunction of the operators for total energy and x component of momentum...

Got a maths exam tomorrow been looking through some past papers. Have hit a stumbling block with regard to complex numbers, the problem lies with my algebra. Homework Statement Show that \arcsin(2) = \frac{\pi}{2}-i\ln (2\pm \sqrt3) Homework Equations I'm fairly certain the way to...

One of the example questions I have is. Evaluate \oint \vec{a}\cdot \vec{dl} around the circle x^{2} +y^{2}=b^{2} for \vec{a}=\frac{\vec{r}}{r^{3}}. Where r has its usual meaning is spherical polars. It's nothing complicated I was just never taught what \vec{dl} actually is when represented as...

Hey, I'm studying for a physics degree and have a general curiosity about vector calculus. Having learned about surface and line integrals for scalar functions in multivariable calculus I've been having some issues translating them into vector calculus. Though conceptually I haven't had much...

This is not really a homework problem but rather a question about an equation for displacement in damped harmonic oscillations that I've come across during revision for midterms. In my notes and in various textbooks the equation is given as x=C\mathrm{exp}(-\frac{b}{2m}t)\cdot\mathrm{exp}(\pm...

Yeah, that's a typo, thanks for the help.

Been doing some physics problems from my mechanics class. This is the first time I've attempted a problem like this and am not so confident with solving it, I could be correct and just being paranoid but I just have a feeling I've made a mistake somewhere, would appreciate if someone who is...

Homework Statement Consider the impact of a crash on the people inside a motor vehicle. What modifications can be made to a car to improve their safety. Describe the physics involved in the modifications. Homework Equations Assumedly Force = mass x accelleration. KE = 1/2 mass x...

The pivot is at the 350mm mark on the ruler which is 1m long, therefore there are 350mm of ruler before the pivot and 650mm after it.

Hello, run into a bit of a stumbling block studying moments perhaps someone could nudge me in the right direction. Homework Statement A uniform metre ruler is balanced horizontally on a knife edge at its 350mm mark, by placing a 3.0N weight on the rule at its 10mm mark. Calculate the weight...

Hello, having had an interest in physics for a while I recently enrolled on an access to higher education course to study it. Unfortunately I seem to have fallen at the first hurdle. First off I'd like to apologise profoundly and profusely for the simple problem you are about to read, but I have...