Recent content by sevendaysky

It says a 20'' horizontal gap between the funnel and the paper. If I do this outside I'll try and set up "with" the wind, every little bit helps at this point. and yeah I'd be trying to get the letters higher up closer to the funnel. I'm trying to ask around to see if there's a local physics...

Someone has suggested a car battery as a safer alternative to a power source, but I don't know if it'd work. The setup, supposedly, is meant to be a vertical thing with 20 inches between the surface and a funnel through which the filings will fall and (hopefully) be pulled toward the flat...

The description says it has to be vertical. However, your thought about possibly having permanent (nonelectric) - that might work. My main concern is like I said above, only the exposed part of the iron nail in my experiment actually attracted anything - how do I get the field to pull toward...

Unfortunately it has to be an electromagnet. It doesn't have to write, just display letters (like a sign).

I'm trying to build a large electromagnet. It's actually 3 letters, as large as I can get them to be and still work. It's for a scavenger hunt. My dad's an electrician and he says he can't figure out how to make it work, I'm hoping someone has some input. The requirements are that it has to...