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jacket of green 1
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As any one have info on making a improvised compass - specifically "the rule of right hand twist" in the use of electricity for magnetising a needles?
steven andrews said:At school we magnetized a needle with a magnet and then sat it in some water on a piece of tissue paper. When you gently poke the tissue paper it sinks, leaving the needle sitting on the surface-tension of the water, pointing North/South.
I recently showed my daugther this - she was impressed with the needle floating on the water - not that interested in the North/South bit!