Recent content by CrazyEgg

The fuel cell idea is on hold at the moment, I've had a lot of coursework and exams to work on. That's why there has been a long delay in replying. Also thanks for listing the layers that need to be in each cell but do you think that you can say what the material of each layer should be...

I'm pretty sure I can get all the materials and maybe even some alternatives to see if there are any differences between each setup. As for lowering the power how about something that produces only 10 watts, would a single cell be able to produce this or will I need a stack even for this amount...

Sorry for not getting back to you sooner Topher. Well for cost and performance, I have a budget of about $500 but I'm willing to go to $600 if I can make a fuel cell with an output of 100 watts. Ideally, I would really like a list of the materials I would need and a set of instructions to...

Can you give me some more info on these fuel cells, when I search for borohydride fuel cells the majority are for how to use sodium borohydride as a hydrogen storage medium. How would I go about making one? Also regarding hydrogen peroxide if I remember correctly they wanted to use that...

Basically as the title says, is it possible to build a DB fuel cell stack? Something that could output 100W (to power a laptop or for power outages). I actually have access to a couple of kilos of sodium borohydride and while looking at what I can do with the stuff I came across this type of...

There used to be a product years ago called PUR, it was a sachet filled with powder which would clean water and was meant to be used in third world countries. I found this from the cdc website: The benefits of flocculant/disinfectant powders are: Proven reduction of bacteria, viruses...

Is it possible to take dirty river water (or any other water for that matter) and use flocculation to turn it into clean and safe water in a short amount of time? I know that you would need a flocculant, something to disinfect the water and I've read that I need a buffer but I'm not sure...

I spoke to my maths teacher on friday and he said that the question was fine. He also said that the assignment needs to be typed up on the computer and even though I wrote mine using a wacom tablet in pdf format he says that I won't be eligable for the top grades because it is not typed up...

Is there still something wrong with the question? This is the only question that I have not answered in my assignment and I would really appreciate it if you could help me out please.

I looked over the entire assignment and I found points for i, j and k in 2 different questions i and j are position vectors while k is a 3d position vector i= (6, -2) j= (-4, -3) and k=(3, 4, 0) Does this help? Also Ivy, could you have a look at my assignment work? you could pm me your...

Thanks for the reply that's the weird thing about the question, all the information that I typed is all the info that it gives. I'll be going in today to actually ask the teacher about it. The thing with the other 2 assignments is that they are in 2 pdf files, should I post a zip file of...

Homework Statement A field is defined by f(i)=2i+1; f(j)=(j^2)-2 and f(k)=(-k^2)-2 a. Describe the Surface b. Find the gradient of the surface at the point This is the last question of an assignment but I actually have no dea on how to even start doing it. Also I've finished 2 assignments...

Well he's not going to be writing about it anymore especially after I sent him a link where the inventor says that the proposed spaceship will reach alpha centauri in 35 months with a maximum velocity of 3 times the speed of light. Honestly a part of me actually wishes that it would work and...

Hi A friend of mine is doing an assignment on alternative sources of energy when he came across this site and sent the link to me: http://www.crossfirefusor.com From reading a couple of pages it seems deceptively simple and I'm told that the guy expects to get a net gain of a couple MW of...

thanks for the reply zapper. First I did look at maglev trains, but they move on a track and what I was asking was if I had an electromagnet rink and floated an aluminium block on it, could the person on top move around the entirety of the rink freely (the way an ice skater would be able to...