Recent content by Wizard

Hi there, I've been stuck on this issue for two days. I'm hoping someone knowledgeable can explain. I'm working through the construction of the quantum path integral for the free electrodynamic theory. I've been following a text by Fujikawa ("Path Integrals and Quantum Anomalies") and also...

Touché

Hello all, I was just thinking how much I would love a book, or even better a portfolio, on different types of data visualisations. I'm sure there are a few such books out there, but I'm looking for something for technically minded people, which organises its examples by the type of data being...

Like most things in life it's dedication and hard work, regardless of how smart you are. What people call 'smart' is often just a measure of how much one enjoys challenging themselves to learn and think about difficult things. Then it looks easy to others when you're ahead of the curve just a...

How does a frequentist rationalise irrational probabilities? ;)

Here's my two cents. Sorry if it is controversial. You probably won't get another chance to do undergraduate, to lead your life in the right direction by becoming qualified in what you love. I'm going to be frank. Engineering is easy compared to physics. I know people are going to get up in...

You might be able to use the drum as a Chladni plate, by attaching a speaker to the bottom side and playing sine waves through it. See here: https://sciencedemonstrations.fas.harvard.edu/presentations/chladni-plates I'm not sure how well this would work for a drum in practice but the principle...

It means that based on the known distribution parameters and a model of how those parameters affect weather, that there is 60% chance of rain on Thursday. Those parameters include all the things a meteorologist might use to predict the weather. How the model is determined, I'm not quite sure...

Isn't this something every barista already knows?

I see my mistake now. The last equation actually is a homogeneous form of the first order. I had not realized that negative powers were permitted. I was not aware of Euler's theorem on homogeneous functions. This is mentioned in the text viz. (610.4) but I had not realized it would apply even to...

In the book "The Variational Principles of Mechanics" by Cornelius Lanczos, the following statement is made about a lagrangian ##L_1## where time is given as an dependent parameter, and a new parameter ##\tau## is introduced as the independent variable, see (610.3) and (610.4) pg. 186,187 Dover...