learnteach (![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png)
learnteach) wrote2009-12-13 11:01 pm
learnteach) wrote2009-12-13 11:01 pm
5 Science Experiments
Dave H, is amazing!
1. Magnetite. If you run a strong magnet over the black bands on the beaches, you'll pull out the magnetite (magnetic iron). Because it has been beach weathered, it's less sharp than iron filings. (http://en.wikipedia.org/wiki/Magnetite) If you keep the magnet in a plastic bag, you can then invert the plastic bag trap them.
2. Soba bottle ? Using a glass bottle that is cylindrical, hit it with a rubber mallet, the bottom will pop out due to cavitation. http://www.metacafe.com/watch/780996/bare_handed_bottle_smash/ ?
Wow. Leads to http://www.amasci.com/
Need to practice!
3. Electronics with fuse in circuit. Electronics with 2 bulbs, break open second bulb, let tungsten burn out--about 2 sec. Cut tungsten clear, heat glass with torch under power, when glass is red hot (orange?) will conduct. Will maintain heat.
4. (3b) Beer bottle heated to warm on a spot will absorb microwaves and heat up. You can melt the bottle.
5. Copper tube with a magnet in it; 3' of tube with neodymium magnets is about 12 sec. of drop.
5b. Shake an aluminum pan with a magnet, it will move and stick.
1. Magnetite. If you run a strong magnet over the black bands on the beaches, you'll pull out the magnetite (magnetic iron). Because it has been beach weathered, it's less sharp than iron filings. (http://en.wikipedia.org/wiki/Magnetite) If you keep the magnet in a plastic bag, you can then invert the plastic bag trap them.
2. Soba bottle ? Using a glass bottle that is cylindrical, hit it with a rubber mallet, the bottom will pop out due to cavitation. http://www.metacafe.com/watch/780996/bare_handed_bottle_smash/ ?
Wow. Leads to http://www.amasci.com/
Need to practice!
3. Electronics with fuse in circuit. Electronics with 2 bulbs, break open second bulb, let tungsten burn out--about 2 sec. Cut tungsten clear, heat glass with torch under power, when glass is red hot (orange?) will conduct. Will maintain heat.
4. (3b) Beer bottle heated to warm on a spot will absorb microwaves and heat up. You can melt the bottle.
5. Copper tube with a magnet in it; 3' of tube with neodymium magnets is about 12 sec. of drop.
5b. Shake an aluminum pan with a magnet, it will move and stick.