Mostly Trivial with your host Johnee Bee

February 2012
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February 2012

Mon, 10 March 2008

Magnets.Very attractive!

If they ate spinach would they have more iron?

The discovery of the magnetic compass was an event of GREAT importance in the history of people. It was the first documented instrument created by mankind that could be read using a precise scale. Of course the sundial had been around for a long time, but it doesn't move [just it's shadow does as you know]. There was the wind vane, but no precise way at that time to measure wind direction. If you think about it, it's pretty hard to measure direction in general, without a compass. The earliest known compass surfaced in China by at least the first century A.D. It apparently didn't arrive in Europe until the twelfth century A.D [1100's]

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What do you know, Joe?

Where are the field lines most concentrated around a bar magnet?

A. At the center. 

B. At both poles. 

C. At the South Pole.

D. At the North Pole.

Last Post Answers: C. Animal Farm

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Direct download: MostTriv_121_Magnets.mp3
Category:podcasts -- posted at: 4:09 PM