Recent content by Jefffff

Because it's a magnetophoretic board, I want to be able to store this energy, and release it to quickly "wipe" the board by running a charge through the board. By drawing energy from the act of drawing on the board itself, I might be able to implement the "erase" and other functions without...

Thanks for the links eq1 - I've done some courses in electromagnetism and understand the fundamental mathematics behind it. From a very simple 1D model where you have a conductive wire going along the x-axis, if you move a bar magnet around near the wire, a current will be produced in the wire...

I understand where you're coming from - if you had a simple bar magnet, however held it vertically from the plane such that the S end was further from the plane than the N end, wouldn't the field in one direction be stronger? The other issue arises which would be the direction of nearby coils in...

Yeah, I thought that the EMF might be wildly inconsistent / in opposing directions depending on the movement. Thanks for your input!

I'm trying to use an magnetophoretic film (like the ones from these toys: https://www.amazon.com/dp/B005NJT4S2/?tag=pfamazon01-20 and figure out a way to generate power through the user's drawing movements, but at a much larger scale than the toy. The end of the pen has a magnet which attracts...

I'm sorry if this question is a little abstract, but would appreciate any guidance! It's for a DIY project I am considering. Suppose you have a flat panel mounted on a wall, and a very strong magnet that will move in any direction on the plane of the flat panel. Through any possible arrangement...

Yes, this is what seems to be the case. Thanks for checking the work! I'll submit a request to the instructor.

Homework Statement A disk of radius R has an initial mass M. Then a hole of radius (1/4) is drilled, with its edge at the disk center. Find the new rotational inertia about the central axis. Hint: Find the rotational inertia of the missing piece, and subtract it from that of the whole disk...

I need the ionic radius of the cation in the following anhydrous salts: FeCl2 and CoCl2 Looking at this database: http://www.knowledgedoor.com/2/elements_handbook/shannon-prewitt_effective_ionic_radius_part_2.html Knowing that the coordination number of both Fe2+ and Co2+ cations is 6, I am...

For a business project, I'm looking into the viability of a greenhouse situated in Canada's far northern town of Iqaluit. The problem is how to mathematically simulate the internal air temperature of the greenhouse. What I already have are detailed 3D renderings of the greenhouse as well as all...

My results when I graphed molarity against percent yield were a weak positive correlation. The slope was 51 exactly however the correlation was 0.8978. I will consider both prospects as I think the percent yield would increase linearly with molarity increases but I haven't been able to find any...

Homework Statement I have performed a chemistry experiment where I analyzed how the diluting of two reactants with the same volume and initial concentration impacts the percent yield of a precipitate product. Thus my IV was concentration and my DV was percent yield. My question is what is the...

Ok, thanks!

Homework Statement A solar heater is used to warm 150 kg of water by 30 K. The intensity of solar radiation is 6000 Wm-2 and the area of the panels is 4.0 m2. The specific heat capacity of the water is 4.2 * 103 J/kg/K. Estimate the time this will take, assuming a solar panel efficiency of...

Okay, thanks for your help!