# Search results

1. ### Particle Physics: Partial Decay Widths and Branching Ratios

Hello there, This isn't specifically homework, it is study. I'm having a difficult time trying to understand how to calculate/estimate partial decay widths, \Gamma[\itex], and Branching Ratios. I haven't found very clear information online so far. Here's just an example below that I'd like...
2. ### Period of Harmonic Oscillator using Numerical Methods

I think I need to determine it more accurately than just using my eyeballs. Later on in the problem sheet I've given, I am required to include damping forces, which will make it harder to determine period using the method you've described. I am required to modify the MATLAB program I've written...
3. ### Period of Harmonic Oscillator using Numerical Methods

I would used EXCEL, but I am required to determine the frequency and therefore the period using only MATLAB.
4. ### Period of Harmonic Oscillator using Numerical Methods

I just realized this a second ago. Thank you, Chestermiller and D H, this is great help. As per my original question, does anything know how I find the period of the oscillations? Do I just use a fourier transform of some kind in MATLAB to find the frequency and then use that to find the...
5. ### Period of Harmonic Oscillator using Numerical Methods

So, am I right or wrong in saying that a_{n} is just -ω^{2}_{0}x, with x(t=0)=0 and ω0 = 1? So how would I write a_{mid}?
6. ### Period of Harmonic Oscillator using Numerical Methods

The way I initially wrote 5 and 6 here were typos, sorry. I used item 1 because that is basically what the initial acceleration is, as stated in the question: \frac{d^{2}x}{dt^{2}}=-\omega^{2}_{0}x, so I subbed in the angular frequency (\omega_{0} = 1) and x(at t=0)=1 to get my initial...
7. ### Period of Harmonic Oscillator using Numerical Methods

I know, but I don't know how to do this.
8. ### Period of Harmonic Oscillator using Numerical Methods

Sorry, I should have written the initial equation of motion as: \frac{d^{2}x}{dt^{2}}=-\omega^{2}_{0}x Basically, I forgot the 'x' on the LHS when I was writing the OP. This will mean that a = - 1 (I forgot to add the 'minus' sign), because x (t=0) = 1 and w = 0. The velocity remains v...
9. ### Period of Harmonic Oscillator using Numerical Methods

Homework Statement Numerically determine the period of oscillations for a harmonic oscillator using the Euler-Richardson algorithm. The equation of motion of the harmonic oscillator is described by the following: \frac{d^{2}}{dt^{2}} = - \omega^{2}_{0}x The initial conditions are x(t=0)=1...
10. ### Finding radius of nucleus from semi-empirical mass formula?

I'm bumping this question up. Any help greatly appreciated. Thanks.
11. ### Deriving Expression for Population Fraction (Statistical Mechanics)

Homework Statement A quasi-3 level solid-state laser gain medium consists of a ground state manifold containing two energy levels within which a single electron can be promoted, with the second energy 10meV above that of the lowest level. A. Where the gain medium is not optically pumped...
12. ### Finding radius of nucleus from semi-empirical mass formula?

Homework Statement The nuclei ^{41}_{21}Sc and ^{41}_{20}Ca are said to be a pair of mirror nuclei. If the binding energy of ^{41}_{21}Sc and ^{41}_{20}Ca is 343.143 MeV and 350.420 MeV, respectively, estimate the radii of the two nuclei with the aid of the Semi-Empirical Mass Formula...
13. ### Quantum Mechanics: Question on Angular Momentum

Thanks TSny, that helped a lot!
14. ### Thermodynamic Derivation of Wien's Law?

P is the Radiation Pressure. It relates to the first law of termodynamics definition of work, PdV. Basically, I'm looking to derive Wien's law from the first law.
15. ### Thermodynamic Derivation of Wien's Law?

Can someone tell me how I can derive Wien's law, i.e., \lambda_{max} T = constant where \lambda_{max} is the peak wavelength and T is the absolute temperature of the black body, using the equation, P=\frac{U^{*}}{3} where U^{*} is the energy density. Note: I'm not looking for...

17. ### Quantum Mechanics: Question on Angular Momentum

Homework Statement Consider a system that is initially in the state: \psi\left(\theta,\phi\right)=\frac{1}{\sqrt{5}}Y_{1,-1}\left(\theta,\phi\right) + \frac{\sqrt{3}}{5}Y_{1,0}\left(\theta,\phi\right)+\frac{1}{\sqrt{5}}Y_{1,1}\left(\theta,\phi\right) Part 1: Find <\psi|L_{+}|\psi> Part 2...

19. ### Thermodynamics: Derive Modifications for TdS equations for Wire under Constant Force

Anyone? Any help greatly appreciated.
20. ### Thermodynamics: Derive Modifications for TdS equations for Wire under Constant Force

Homework Statement I have been stuck on the following question for a while now, particularly part B and C, and I'd like some help with it please. I've completed part A already. The Question: (A) Combine the following TdS equations: TdS = C_{v} dT + T\left(\frac{\partial P}{\partial...
21. ### Configuring op-amp to supply constant current

Homework Statement How could an op-amp with feedback be configured so that it would supply a constant current to some load, even if the resistance of the load changed? Homework Equations None. Just a general question. The Attempt at a Solution I don't really know how to approach...
22. ### Find matrix of T with respect to the standard basis of R^3

Homework Statement For this whole question let T be a linear transformation from R^3 to R^3 with T(1,0,0) = (2,2,2), T(0,1,0) = (1,2,2), T(0,0,1) = (0,0,1). (a) Find the image of (1,1,2009) (b) Find the matrix of T with respect to the standard basis in R^3 Homework Equations Standard...
23. ### Physics BSc in Physics to Finance

Thanks very much for your reply. So basically you're saying that physics/math students have greater problem solving ability than quant. finance students or CS students. In this regard, would it be better if I stayed in physics until I finish my Ph.D. and then make a transition into finance or...
24. ### Physics BSc in Physics to Finance

Hey there, I'm in second year of a physics/math degree. I've had some revelations over the past year and realise that I probably will not be interested in entering into the field of research or academia. I'm looking at the field of finance now (I hear that this is a common career path for...
25. ### Is it right to say that calculus is advanced algebra?

I was having a discussion with a friend and I wanted to know if the following statement is true: "calculus is advanced algebra and deals with curves (changing numbers), group theory is another branch of advanced algebra. The point is they are all algebra."
26. ### Physics Careers w/ physics

In a biased overstatement, I would say asking about the career options you can take after your physics degree is like asking exactly when 0.9999...(to infinity) will reach 1.
27. ### Engineering Physics? Engineering?

Casual physics bashing as usual.
28. ### Programs How Much Free Time do Physics Majors Have?

I'm majoring in Physics and I have about 32 hours (!!!) a week this semester between lectures, tutorials and labs. This is over 6 hours a day on average but that is spread over the entire day so I'm in university for about 9 hour every day on average, with 3 hours of breaks in between. On top of...
29. ### Physics Physics Major to related career?

Unfortunately I can't change my major at all, however I can change my minor, just the system we have over here. We have to choose our major at the end of secondary school (high school). The only way I can do that is to drop out and reapply but that has financial implementations. I have to remain...
30. ### Physics Physics Major to related career?

I was looking into trading or maybe financial analysis, however I'm not too sure yet. I'm only in first year of university and I'm just basically weighing up what I should be aiming for. I was looking at University College Dublin or Trinity College Dublin for this grad programme (I don't...