Re: Newton's Cradle

[Bernard Cleyet <anngeorg@PACBELL.NET>]

Use a magnetic recording tape bulk demagnetizer if you don't have in you lab a high
inductance coil air core coil, e.g. the coil for a Busch apparatus. (a ferromagnetic
core will ensure demagnetization).  Use a Variac if it doesn't have enuff L to
prevent overheating.   Put a ball next to the core (or the open end of the coil) with
max. safe current. remove slowly, then shut off pwr.

bc  who had to demagnetize a shadow mask this way.

David Abineri wrote:

> The steel spheres in the Newton's Cradle I have are now magnetized be
> being too close to a powerful magnet. While this produces some
> interesting variations of the cradle's normal operation, I would prefer
> non magnetic spheres.
>
> Is there a convenient way to demagnetize a sphere?
>
> Thanks,     David Abineri
>
> --
> David Abineri
> dabineri@choice.net
>
> This posting is the position of the writer, not that of SUNY-BSC, NAU or the AAPT.

This posting is the position of the writer, not that of SUNY-BSC, NAU or the AAPT.