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Subject: Re: Water Hammer Hazard
Date: Mon, 27 Nov 2006 17:18:16 -0500
Author: Don Abramowitz 		Next by Date:
Subject: RADIOACTIVE MATERIALS IN SCHOOLS
Date: Tue, 28 Nov 2006 10:03:55 -0500
Author: Barbara Foster


Date: Mon, 27 Nov 2006 16:36:13 -0600
Reply-To: "Murphy, Dr. Ruth Ann" <rmurphy**At_Symbol_Here**UMHB.EDU>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: "Murphy, Dr. Ruth Ann" <rmurphy**At_Symbol_Here**UMHB.EDU>
Subject: Re: Water Hammer Hazard Details
In-Reply-To: A<3C6EE2B43CB1F248A13F58A419EEA13811B0DE**At_Symbol_Here**wstf-mxs01.wstf.jsc.nasa.gov>


Quoting from Frey Scientific's 2002 catalog:  "This device demonstrates
an unusual property of water in an evacuated cylinder.  When held in
vertical position with bulb at top and lifted and lowered in 1 quick
motion, water will fall in the tube making an amazingly loud sound.
Showing that in a vacuum, water behaves like a solid-moving as a whole.
10"Lx1"dia. 1 1/2"bulb."

Ruth Ann Murphy

-----Original Message-----
From: DCHAS-L Discussion List [mailto:DCHAS-L**At_Symbol_Here**LIST.UVM.EDU] On Behalf Of
Greene, Ben
Sent: Monday, November 27, 2006 3:27 PM
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Subject: Re: [DCHAS-L] Water Hammer Hazard

What is this device and what is it suppose to do?  Water hammer like in
condensation induced water hammer in steam systems?

Ben Greene
Chemist

-----Original Message-----
From: DCHAS-L Discussion List [mailto:DCHAS-L**At_Symbol_Here**LIST.UVM.EDU] On Behalf Of
Dan Crowl
Sent: Monday, November 27, 2006 2:18 PM
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Subject: Re: [DCHAS-L] Water Hammer Hazard

Ruth,

My physics teacher in high school had the same result the first time he
used the device in class!

That was in 1966!

I bet it is the same device!

Dan Crowl
Professor of Chemical Engineering
Michigan Tech University
Houghton, MI

Murphy, Dr. Ruth Ann wrote:
> Dear CHAS Members:
>  
> A water hammer (lecture demonstration device) broke this month when 
> lowered, sending glass flying in my classroom.  The water hammer is 
> designed to make a loud noise when properly lowered; however this 
> hazard, previously unknown to me, should require strict warnings for 
> its use, or the substitution of something safer.
>  
> Ruth Ann Murphy, Ph.D. 
> Chemistry Dept. Chairperson and Professor The University of Mary 
> Hardin-Baylor 900 College Street Belton, TX  76513-2599 Phone (254)
> 295-4542 Fax (254) 295-4237
>
>

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