Date: Thu, 31 Jan 2008 09:24:15 +0100
To: rsgb_lf_group@blacksheep.org
From: Rik Strobbe <rik.strobbe@fys.kuleuven.be>
In-Reply-To: <000801c863ab$49872450$bf5d60cb@SN2941077064>
References: <000801c863ab$49872450$bf5d60cb@SN2941077064>
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Message-Id: <20080131082252.CA2F231E702@smtps01.kuleuven.be>
Subject: Re: LF: water heated by soundwaves
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George,

ultrasonic waves are "shockwaves" (just like sound, only at higher 
frequency) that change the density of the medium. A complete 
different mechanism than electromagnetic waves.
If you add energy into the water, no matter how, it will heat and 
eventually boil. Nothing to be stunned about.
Ultrasonic waves have been used for ages to heat stuff. Big advantage 
is that the energy can be focused to one spot to get local heating.
Ultrasonic ovens It has also been proposed as "save alternative" to 
microwave ovens, but with little success as it turned out to be very 
expensive to build an oven that would withstand the vibrations.

73, Rik ON7YD - OR7T

At 02:47 31/01/2008, you wrote:
>hi a most interesting news item on nz tv..An elderly gent. (90s) has 
>got a device where he inserts a sphere into a large tumble of water 
>and after a short period the warter boils..he says its done bye 
>ultra sonics...It has stunned professors and science standards...he 
>wont let on much...thats the million dollar question just ??? i got 
>a feeling the highfreqency audio electric current is heating the 
>water ..BUT IS IT....george zl3pn


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George,<br><br>
ultrasonic waves are &quot;shockwaves&quot; (just like sound, only at
higher frequency) that change the density of the medium. A complete
different mechanism than electromagnetic waves.<br>
If you add energy into the water, no matter how, it will heat and
eventually boil. Nothing to be stunned about.<br>
Ultrasonic waves have been used for ages to heat stuff. Big advantage is
that the energy can be focused to one spot to get local heating.<br>
Ultrasonic ovens It has also been proposed as &quot;save
alternative&quot; to microwave ovens, but with little success as it
turned out to be very expensive to build an oven that would withstand the
vibrations.<br><br>
73, Rik ON7YD - OR7T<br><br>
At 02:47 31/01/2008, you wrote:<br>
<blockquote type=cite class=cite cite=""><font size=2>hi a most
interesting news item on nz tv..An elderly gent. (90s) has got a device
where he inserts a sphere into a large tumble of water and after a short
period the warter boils..he says its done bye ultra sonics...It has
stunned professors and science standards...he wont let on much...thats
the million dollar question just ??? i got a feeling the highfreqency
audio electric current is heating the water ..BUT IS IT....george
zl3pn</font></blockquote><BR>
<BR>
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