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- Path: sparky!uunet!think.com!spool.mu.edu!agate!usenet.ins.cwru.edu!po.CWRU.Edu!dxf12
- From: dxf12@po.CWRU.Edu (Douglas Fowler)
- Newsgroups: misc.kids
- Subject: 2 simple experiments with magnets
- Date: 16 Nov 1992 00:15:26 GMT
- Organization: Case Western Reserve University, Cleveland, OH (USA)
- Lines: 40
- Message-ID: <1e6p6uINNf9o@usenet.INS.CWRU.Edu>
- Reply-To: dxf12@po.CWRU.Edu (Douglas Fowler)
- NNTP-Posting-Host: slc12.ins.cwru.edu
-
-
- Our grandpa showed my cousins and I a neat "magic" trick over the
- weekend, and I thought I'd share it with everyone. You need:
- A strong magnet
- A shoebox with a cover
- A table
- A 40-inch long piece of thread
- A metal paper clip
-
- Put the magnet inside one end of the box. Put some books inside the
- box to hold it down, then cover the box. Sit the box on a table so the end
- with the magnet hangs over the edge.
- Tie the paper clip to one end of the thread. Put the opposite end
- of the thread on the floor dirctly under the magnet, and sit another book
- on this end.
- Raise the paper clip toward the box, and adjust the thread's length,
- pulling the thread from beneath the book, until the clip is held up without
- falling. Stand back, and you will see the paper clip floating in mid-air.
- Since magnet fields extend in all directions and pass through the
- cardboard shoe box, the clip is attracted by the field, but is kept from
- sticking to the box by the thread.
-
- -----------------
- Here's a way to make a compass. You need:
- A needle
- A magnet
- A bowl of water
- A 1/4-inch to 1/2-inch thick cork.
-
- Magnetize the needle by stroking it at least 50 times in 1 direction with
- either end (pole) of the magnet.
- Float the cork in the bowl of water. Carefully center the needle on the
- cork.
- THe magnetized needle will be attracted to the Earth's magnetic field
- and turn north toward it.
- --
- Doug Fowler: dxf12@po.CWRU.edu : Me, age 4 & now: "Mommys and Daddys & other
- "Thou shalt love God with all: relatives have to give lots of hugs & love
- thy heart...*and thy neighbor as: & support, 'cause Heaven is just a great
- thyself*." Luke 10:27 : big hug that lasts forever and ever!!!"
-