Date: Mon Oct 29 14:07:29 2007

Author: Wallin, Stephen R

Subject: Re: Slotted Weights, Expensive

Post:
We tried sciencelab last year, but it was both expensive and slow (though quick to charge)

-----Original Message-----
From: tap-l-owner@lists.ncsu.edu [mailto:tap-l-owner@lists.ncsu.edu] On Behalf Of Bill Norwood
Sent: Friday, October 26, 2007 1:18 PM
To: tap-l@lists.ncsu.edu
Cc: teg@physics.umd.edu; 'Allen Monroe'
Subject: [tap-l] Slotted Weights, Expensive

Hi Tappers,

We need to buy a few hundred slotted weights, but these prices are
prohibitive. Anyone got any experience with an alternate source. Out of
frustration I have actually manufactured batches of 10g and 20g weights, but
there should be a better way.

Many thanks for any information.

Bill Norwood
Physics, U of MD, College Park
301-405-6006



http://www.sargentwelch.com/product.asp_Q_pn_E_WLS4320-40_EA_A_Slotted+Gram+
Weight+Sets_E_

WLS4320-20A
Metric Slotted Masses, 1g
In stock $8.70

WLS4320-20B
Metric Slotted Masses, 2g
In stock $8.70

WLS4320-20C
Metric Slotted Masses, 5g
In stock $8.70

WLS4320-20D
Metric Slotted Masses, 10g
In stock $8.70

WLS4320-20E
Metric Slotted Masses, 20g
In stock $8.70

WLS4320-20F
Metric Slotted Masses, 50g
In stock $8.70

WLS4320-20G
Metric Slotted Masses, 100g
In stock $9.10

WLS4320-20H
Metric Slotted Masses, 500g
In stock $24.50




-----Original Message-----
From: tap-l-owner@lists.ncsu.edu [mailto:tap-l-owner@lists.ncsu.edu] On
Behalf Of Anthony Lapinski
Sent: Friday, October 26, 2007 2:29 PM
To: tap-l@lists.ncsu.edu; tap-l@lists.ncsu.edu;
phys-l@carnot.physics.buffalo.edu
Subject: [tap-l] plasma sphere

I have my large plasma sphere out for some upcoming Halloween demos. Kids
are amazed by this device. One asked why the glowing purple lines (between
the central electrode and the outer glass surface) always rise. I never
really noticed this before, so I examined the motion for a while and it
was true. I was and remain baffled.

So why do those line rise?




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