Recent content by ffleming7

What is the difference between a scientific theory and a scientific law? Is there a fundamental difference or is a scientific law just a scientific theory that is extremely well accepted and supported. If that is the case, why is the Theory of Evolution not a scientific law, considering how...

Yes! It is a very interesting look into Einstein's life. Walter Isaacson is a great writer and explains Einstein's seemingly complex ideas in terms anyone can understand. However, I am no expert.

Almost all magazines do that. They give you a lot of their recent magazines with old news right away so they can end your order in April, when maybe you ordered it and they said it will take about six weeks.

Thank you. That makes a lot more sense now. So \frac{\frac{m}{s}}{s} = \frac{m}{s}* \frac{1}{s}=\frac{m}{s^2}.

Why is the SI unit for acceleration \frac{m}{s^2}(meters per second squared) when it is actually \frac{m}{\frac{s}{s}} (meters per second per second). Isn't the part concerning the seconds different? Wouldn't this give you different answers sometimes, or does that usually never get in the way.

That makes sense. What is an elliptical mirror?

I was wondering if you could put a laser beam into a set of mirrors and then once you turn the laser off, have the laser still bouncing off the mirrors. The only way I could think of was if you used a beam splitter like in the diagram.

You could make a hologram. I have never tried it, but it always sounded interesting.

In Algebra we are learning and using imaginary numbers. Someone asked if imaginary numbers are ever used outside of math, and our teacher said he talked to an electrical engineer who used imaginary numbers all the time. Our teacher didn't know how or why they were used in electrical...

Could it be that he was talking about a proton instead of a photon? Is he talking about quantum entanglement?

Here's a picture of the equation from the talk. It's hard to see.

It is very very long.

On Neil Turok's TEDtalk he talked about a single equation that described all known physics. He put the equation in the background, but it was hard to read. Does anyone know what this equation is and if it is ever practical?

It was the 15C, but they don't make these anymore, and that was why I was wondering if I could still get a relatively cheap RPN calculator. I have recently learned about RPN and the HP-15C on the Cosmic Variance blog. RPN sounded amazing and so did the HP-15C, and now I want an RPN calculator.

Is HP the only company that sells calculators with RPN? Why is the HP-12C so expensive? It doesn't look expensive. I was wondering if it was possible to get a small pocket calculator that used RPN that wasn't too expensive?