Date: Mon Oct 19 15:11:17 2009

Author: Bernard Cleyet

Subject: Re: lead brick

Post:


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I posted similarly on phys-l -- note the addition of using already
safely encased batteries and other sources.

bc
----------------------------
I pick up during my walks the tyre balancing weights. I now have a
coffee can full for eventual casting. Tyre firms may collect recycle
money, so not readily given, but try (and try , try again). I use
small (e.g. 12 V. 10 AH) Pb-acid batts. for clamping when gluing and
as inertia and increased friction for rigidity of my coffee table low
friction cart track. These are plentiful where ever electric carts
are used. e.g. Santa Barbara Beach rentals (from a friend) and
golfing**. These are handily already encased, but don't use as a
Behr free fall dropper; acid all over.

** Uninterruptible P/Ss too.


bc full of humor today.

Recyclers are another source. Also the backing of dental X-ray film
-- this will require many dentists and use of exploited student
labour. Finally, EH&S have oodles of those little (and not so
little) Pb bottles to transport radio-active sources. You have a
research Bio. Dept.?
-----------------------------

On 2009, Oct 18, , at 19:37, Thomas Senior wrote:

> You can also go to a tire store, they use lead masses to balance
> tires, and have to dispose of lots of little pieces. A fellow
> physics teacher used to go to the stores and collect the lead bits,
> then melt them down and pour them into 1 kg blocks. I am sure you
> could eventually get the 40 or so pounds of lead you want for your
> block that way with a lot of perseverance and some good luck.
>
> Tom
>
> From: chuck...
> To: tap-l@lists.ncsu.edu
> Sent: Thu, October 15, 2009 7:07:17 PM
> Subject: Re: [tap-l] lead brick
>
> try a scrap yard and other metals also. Why not a 2' section of
> railroad
> track, etc...
>
> cheers,
> chuck...
>
> -----Original Message-----
> From: tap-l-owner@lists.ncsu.edu [mailto:tap-l-
> owner@lists.ncsu.edu] On
> Behalf Of Anthony Lapinski
> Sent: Thursday, October 15, 2009 11:53 AM
> To: tap-l@lists.ncsu.edu; phys-l@carnot.physics.buffalo.edu
> Subject: [tap-l] lead brick
>
> I'm looking for a rectangular lead brick to do some mass/weight/
> inertia
> demos. I got one (2" x 4" x 8", mass = 12.5 kg) from Biodex years
> ago, and
> now they want $85 for it.
>
> Anyone know of a relatively inexpensive source for these bricks?
>
>
>


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I posted similarly on phys-l -- note the addition of using already =
safely encased batteries and other =
sources.

bc
----------------------------
I pick up during my walks the tyre balancing = weights. I now have a
coffee can full for eventual casting. = Tyre firms may collect recycle
money, so not readily given, but try (and = try , try again). I use
small (e.g. 12 V. 10 AH) Pb-acid = batts. for clamping when gluing and
as inertia and increased friction = for rigidity of my coffee table low
friction cart track. These are = plentiful where ever electric carts
are used. e.g. Santa Barbara = Beach rentals (from a friend) and
golfing**. These are handily = already encased, but don't use as a Behr
free fall dropper; acid all = over.

** Uninterruptible P/Ss too.


bc full of = humor today.

Recyclers are another source. Also the = backing of dental X-ray film
-- this will require many dentists and use = of exploited student
labour. Finally, EH&S have oodles of = those little (and not so
little) Pb bottles to transport = radio-active sources. You have a
research Bio. = Dept.?
-----------------------------

On 2009, Oct 18, , at 19:37, Thomas Senior wrote:

You can also go to a tire = store, they use lead masses to balance
tires, and have to dispose of = lots of little pieces. A fellow
physics teacher used to go to the = stores and collect the lead
bits, then melt them down and pour them into = 1 kg blocks. I am
sure you could eventually get the 40 or so = pounds of lead you want
for your block that way with a lot of = perseverance and some good luck.
Tom

------------------------------------------------------------------------
* chuck... <= br>*To:* tap-l@lists.ncsu.edu
*Sent:* Thu, October 15, 2009 = 7:07:17 PM
* Re: [tap-l] lead = brick
****
try a scrap yard and other metals also. Why = not a 2' section of
railroad
track, = etc...

cheers,
chuck...

-----Original = Message-----
From: tap-l-owner@lists.ncsu.edu<= span
class=3D"Apple-converted-space"> [mailto:tap-l-owner@lists.ncsu.edu]= On
Behalf Of Anthony Lapinski
Sent: Thursday, October 15, 2009 = 11:53 AM
To: tap-l@lists.ncsu.edu; phys-l@carnot.physics.bu= ffalo.edu
Subject: [tap-l] lead brick

I'm looking for a = rectangular lead brick to do some
mass/weight/inertia
demos. I got = one (2" x 4" x 8", mass =3D 12.5 kg) from Biodex
years ago, and
now = they want $85 for it.

Anyone know of a relatively inexpensive = source for these bricks?

**
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**=

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