Magnetism, how weird is that? (1 Aug, 2017)

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Magnetism, how weird is that? (1 Aug, 2017)

Postby aardvark_admin » Tue Aug 01, 2017 10:00 am

This column is archived at: http://aardvark.co.nz/daily/2017/0801.shtml

How spooky is magnetism?

Why is it that we know so little about a force that is so critical to our technology and our very survival on the face of this planet?

Are magnetic "shields" an option for interplanetary travel, so as to protect the occupants of spacecraft from the harmful radiation which exists outside the earth's own magnetosphere?

And what's the coolest thing you have ever done with magnetism?
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Re: Magnetism, how weird is that? (1 Aug, 2017)

Postby aardvark_admin » Tue Aug 01, 2017 10:39 am

Bah... I should have known :-)

Mind you, that's just the sets -- you can still buy/import neodymium magnets I believe. If not then I'm in trouble :-)
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Re: Magnetism, how weird is that? (1 Aug, 2017)

Postby GSVNoFixedAbode » Tue Aug 01, 2017 10:51 am

Although Consumer put a slightly different spin on it:
The ban does not include hardware magnets, magnets used for teaching purposes by schools and universities or those intended to become part of another product.
So the toys themselves are out but using the magnets as part of something else is still fine.
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Re: Magnetism, how weird is that? (1 Aug, 2017)

Postby phill » Tue Aug 01, 2017 11:05 am

im calling bullshit

( much to my surprise ) a modern 10c piece is magnetic
that photo is faked .. they are not magnets super or otherwise

and simon would know .. he seems an expert on what should or should not be swallowed
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Re: Magnetism, how weird is that? (1 Aug, 2017)

Postby roygbiv » Tue Aug 01, 2017 11:10 am

Long ago in London my friend had a flat in one of those disastrous council tower blocks built in the 60s. The place used to be freezing in winter where the power bill took up too much of his pay. So he drilled a tiny hole in the electricity meter which he could put a pin in when he came home from work allowing the flat to heat up and cook dinner whilst the rotating meter disc was halted.
I suggested as an alternative that he took the magnets out his broken Sony Walkman headphones and put them above and below the circulating disc on the meter.
In theory the Eddy currents generated in the disc due to the magnetic field would slow its rotation thus slowing the usage clocked by the meter. This we agreed was 'less' illegal than the pin method.

I never found out whether this worked for him. :roll:
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Re: Magnetism, how weird is that? (1 Aug, 2017)

Postby hagfish » Tue Aug 01, 2017 12:07 pm

Umm, NZ Post doesn't want you posting magnets... not even that feeble set of fridge poetry.
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Re: Magnetism, how weird is that? (1 Aug, 2017)

Postby aardvark_admin » Tue Aug 01, 2017 12:37 pm

Fridge magnets??? Seriously?

Compasses??? Seriously?

Are they worried that the boy-scouts who deliver the mail will get lost because their own compass will read incorrectly if there's a magnet or compass in a package somewhere onboard?

Seriously odd.
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Re: Magnetism, how weird is that? (1 Aug, 2017)

Postby phord » Tue Aug 01, 2017 1:28 pm

high power magnets are still a free-for-all.

I seem to remember some years ago, your column was about how importing these strong magnets was going to be regulated.
If a child swallowed 2 of them, the magnets could come together to strangulate the bowel.
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Re: Magnetism, how weird is that? (1 Aug, 2017)

Postby aardvark_admin » Tue Aug 01, 2017 1:48 pm

Why not just pass a regulation that says "A child may only swallow one magnet at a time under threat of punishment by a term of imprisonment not less than 12 months" -- that'll teach the little buggers! :lol:
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