I have a body which is instantiated on earth at some latitude, longitude and altitude. The body has acceleration which is expressed in body coordinates and the acceleration can be integrated to obtain the velocity vector which...

Transformation from Body-frame to ECEF-frame]]>

I need to learn as much as I can about single photon counting pixel detectors (producing a signal for each photons hitting the detector) e.g. PILATUS. I do not understand how this type of detectors counts single photons as opposed to integrating the energy of multiple photons (CCD, MOS,...

Single photon counting pixel detectors vs CCD]]>

Self powered car.. Advice?]]>

Consider a sphere of radius ##R##

Calculating the E-Field inside and outside a sphere.]]>

I've done a(i) but I can't do a(ii).

Thanks]]>

Hello all,

I am designing a system which will basically just stand in two different positions all the time by a compressed spring. The spring is pushing the system while the forces on...

Energy lost due to bushing friction]]>

Use the first example in Lecture 38 to evaluate [itex] \int_{0}^{2\pi} cost\: sint \:dt [/itex]

http://s8.postimg.org/ccycky76d/Screen_Shot_2015_04_25_at_9_47_41_PM.png

Residue...

Evaluate real integral]]>

Does h-bar change in gravitational waves?]]>

I don't actually need help with an entire problem, I just can't seem to figure out what goes on when an atom is formed from a molecule in a Born-Haber cycle.

For example:

The formation of a chlorine atom from a chlorine...

Born-Haber Cycle]]>

If we take the K-G eqn and the following term for the wave function

$$( \partial^2 + \frac{m^{2}c^{2}}{\hbar^{2}})\Psi =0

\\\\\Psi = Re^{-i\omega t + i k_{i}x_{i}}$$

We worked through to this ##\hbar \omega = \pm...

Stuck on last part of class derivation (proof) K-G Eqn]]>

I'm an art student trying to recreate this phenomenon, but maybe on a larger scale.

I'm trying to create a sculpture that is able to do that. If I can rely on just structure and not worry about materials, that would be great, since my plan is to be...

Capillary Action, Are there structures that aid it?]]>

Uncertainty of position in an infinite potential well]]>

With just a B.S. in Physics, what percent of the threads on PF can you contribute to conversationally or answer (if it's a question thread), and what percent are on topics with which you are familiar enough to understand the subject?

Personally, I could contribute...

Question for those with a four-year degree in Physics:]]>

I'm an engineering student with an avid interest in Maths. I wish to do some kind of research in Maths someday and Really enjoy studying it.

Of late, I have been reading a lot of Maths books on different topics and it's getting hard to keep track of everything I've read. I have...

Good iOS apps that help in taking notes?]]>

Thanks]]>

The Dawn spacecraft observed Ceres for an hour on Jan. 13, 2015, from a distance of 238,000 miles (383,000 kilometres). A little more than half of its surface was observed at a resolution of 27 pixels. This video shows bright...

Ceres at RC3, 13500km above surface]]>

Thank you for stopping by this thread. I'm an engineering student rekindling an interest in Maths. I just love studying Maths in my free time (and sometimes it trespasses into my non free time). I have plenty of fantastic books on my iPad and it's really helping me.

However, I have...

How to take notes in self studying Maths ?]]>

A = [b

Symmetry of Orthogonally diagonalizable matrix]]>

Faraday Cage not working]]>

Excerpt from the article

Finally a Real Twin paradox!]]>

CCDs, MOS and Single photon counting pixels]]>

Two observers, A & B, each with standard clocks are travelling at 0.866c relative to one another, then each will read the others clock as running at half the speed of their own (lorentz factor 2)

If a...

Do clocks really run slow?]]>

I think it's a pretty...

A pretty interesting counting problem]]>

where ##\alpha = \frac{g_{EM}^2}{4\pi}## and ##W## is the centre of mass energy.

Is this the same...

Cross Section for e+e- in EM interaction - Is it the same?]]>

I think that by...

Electrical physics question]]>

hello all,

I'm in the middle of solving a d.e using the series method. I have come across a weird pattern in part of my solution that I'm confused about:

6, (6)(10),(6)(10)(14),(6)(10)(14)(18),.....

General relation for a pattern?]]>

I bought a Bendpak 10000 lb automotive lift. the motor supplied is 220 single phase or 3 phase (i am using single phase)

the motor for 220 single phase is supplied with a...

electrical amperage question]]>

1. Since both spin direction and momentum are vectors, would not their apparent...

Weak Isospin, Chirality and Helicity]]>

Recall the definition of the overlap of wave functions Φ and Ψ:

[; (\Psi , \Phi ) = \int\limits_{-\infty}^\infty dx\: \Psi ^{*} (x)\Phi(x);]

Let ψ1(x) and ψ2(x) be unit-normalised wavefunctions representing sharp-energy...

Finding overlap of fuzzy energy states]]>

∞

∑ tan(1/k)

k=5

show that it is convergent or divergent

i used ratio test, but it's equal to 1, it means no works...

i used divergence test, it equals...

convergence or divergence]]>

View attachment 82531

I thought of using the divergence theorem where

View attachment 82534

I find that ∇.F = 3z

thus integral is

∫ ∫ ∫ 3z r dz...

Using divergence theorem?]]>

Should not there be R (resistance) instead of I (current)in the last line i.e

I ∝ m/a^2]]>

I have a conceptual problem. How can both General Relativity and a theory of Quantum Gravity simultaneously exist? GR describes gravity as the curvature of spacetime, while QG is most likely a gauge theory. Furthermore, if gravity is indeed describedby particle interactions-what does...

General Relativity and Quantum Mechanics?]]>

The question asks me to convert the following integral to spherical coordinates and to solve it

Finding limits of integral in spherical coordinates]]>

By no means do I consider myself a professional by any means, but I have been putting out an...

Can time equal 0 in a Singularity?]]>

i want to know how to make liquid nitrogen?

i wont make a one. but i only want to know how to make it .]]>

Can someone help me confirm if I answered correctly please?

a) A sample of gas is enclosed in a cylinder by a piston. The cylinder is given 225J of energy which expands and pushes the piston 16cm outwards against an...

Thermodynamics First Law Question]]>

243 is a decimal number. You must convert it to base n, where n will be computed using the

digit (d) 5.

For example if your digit (d) was "7" , then n is

calculated as :n = d % 6 + 2 (where d = 7) = 7%6 + 2 = 3

Number Systems]]>