Recent content by SeannyBoi71

Hi, I am doing a geophysics assignment and had some confusion. Basically I want to know why oceanic crust is so much thinner than continental crust. My friend has told me it's because there is less weight on top of it because the ocean water is not very dense, causing the mantle to rise up...

That's what I was trying to say, except this is much nicer. Thanks Bob!

You're not just squaring the wave function, you do the square modulus. This means you multiply the wave function by its complex conjugate, here it is [tex] \Psi = \sqrt(2) exp(iEt) sin(n\pi x) [\tex] When you work it out, the i's should cancel out. i2= -1 ALWAYS, from my knowledge at least...

Hi all, just studying for my final exam and needed a little clarification on this. Our prof did an example: Consider a particle of mass m moving in the nth energy eigenstate of a one-dimensional infinite square well of width L. What is the uncertainty in the particle's energy? He said the...

I had to google 'sinc function' to find out what it was... We have not been taught this so surely there is a way to find the attributes of the transform by simply looking at it. Our prof mentioned something about finding the general root of the transform (here it would be whenever the cos term...

Homework Statement So this is a physics problem, but this question doesn't really have to do with the "physics" part of it as much as simply calculating the Fourier transform. (This is a second year physics course and our prof is trying to briefly teach us math tools like this in learning...

Ok this is what I was looking for, thank you.

I was aware of this method being the easy way out :-p I am pretty proficient with Excel and have only recently started using Matlab, so I was trying to familiarize myself a little bit more with graphing this way.

Hey all, I am plotting some data using MATLAB and have a question. Basically, this is what I'm trying to do. I am calling a bunch of data from Excel, plotting this data in MATLAB (it gives me two lines), and then calculating the polyfit values for each line so I can find the equation y = mx...

Homework Statement Two events are observed by inertial observer Stampy to occur a spatial distance of 15 c·s apart with the spatial coordinate of the second larger than the spatial coordinate of the first. Stampy also determines that the second event occurred 17 s after the first. According...

Great, thanks very much to both of you for helping!

So just double checking, diving by 1.12 (gamma) means that I'm actually solving for the proper time, since delta t / gamma = proper time. So in the year that Heidi traveled before Hans left, she aged .89 years while Hans aged 1 (he was at rest in Earth's frame). Now since it takes .9 years...

The two events separated by 0.9 years are 1) Hans leaves Earth and starts traveling towards Heidi, who is at .45 cy, and 2) Hans catches up with Heidi. 1) She is moving for exactly one year so I should multiply her Lorentz factor by 1 year, so I get that one year of Earth time is 1.12 years...

Ok, I see that I was wrong about Heide's being in Earth's rest frame. In Earth's frame Heide and Hans are both still moving relative to Earth. The gamma for Hans and Heide in Earth's frame, respectively are 3.203 and 1.120. I am still not sure where to go from here because I don't know who...

Our prof has not told us how to solve any problems using a space-time diagram, so I need a different way to go about this. And yes I see you are right about Heide moving. Does this mean neither of them will measure the proper time then?