Recent content by fletch-j

I eat a low carb diet (fully ketogenic) since I find it just gives me constant energy throughout the day, no spikes/troughs, but after a little while I started losing the ability to concentrate and I couldn't really sit down and do a lot of maths work at once like I usually could. I did 3...

I am doing a little research project into numerical methods of solving ODEs where I do 1 half of learning about the basics of numerical methods and then look at a particular method (Linear multistep) and then the second half is looking at a particular example, applying what I've learned and...

I'd be interested to know what you guys think of this. Do you think that physics, physical discoveries and developments in our general understanding of the universe relies on the work of a few brilliant individuals (Galileo, Newton, Maxwell, Einstein etc.) or do you think that, without them...

Heliocentrism is a main example of how a physical law changed due to the Copernican Principle - that is, that we as humans on the Earth are not privileged or special in the universe. Are there many other examples from the history of science where a major advance in the development of a...

But if you have a loop of wire moving through a constant magnetic field then there is no change in flux so no induced emf.. What is the difference between a moving straight wire and a loop/coil?

We just went over Faraday's law in class and our teacher stressed how a changing flux is needed to induce an emf in some coil/loop/wire. I was just wondering then, how is an emf induced in a straight conducting wire moving at a constant velocity in a constant magnetic field? It seems as if...

Ah crap, that makes perfect sense. Thanks for being blunt. Any ideas about about the approximation question?

I am aware that for a function of two variables f(x,y) a linear approximation of a point f(x,y) close to f(x_0,y_0) can be approximated by the tangent plane approximation f(x_0+\Delta x,y_0+\Delta y)\approx f(x_0,y_0)+f_x(x_0,y_0)\Delta x+f_y(x_0,y_0)\Delta y where \Delta x=x-x_0 and \Delta...

Ohhh okay! That clears things up. I was making it too complicated for myself... Thanks for your patience :P Have a nice day/night (depending on where you are in the world)

Ok, so are you saying the electrons just don't return to the power source? Could you set up a circuit that goes : [negative terminal of battery] --- [Load] --- [earth]

Wait.. So you're saying it is possible? I thought it would be fundamentally impossible... Fill me in... This is what confuses me about grounding, it seems as if they cannot complete their loop. Could you elaborate a bit?

This is an example of a circuit that I'm talking about 'denying the notion that "a circuit must be closed for current to flow"' upload.wikimedia.org/wikipedia/commons/d/db/Resistive_divider.png

I was just wondering if the following is true/possible: - Could a circuit be made that is connected from a terminal on one battery, through a load, and then connected to the opposite terminal of another battery, where the batteries aren't touching? I believe it isn't possible, but would...

I think that it would spawn a whole new range of technologies and could be a big game-changer in renewables and consumer electronics. Now some of that battery technology needs to become financially viable so it can come out of R&D and into the market...

An expert is someone who knows some of the worst mistakes that can be made in his subject, and how to avoid them. - Werner Heisenberg