Date: Mon, 21 Feb 2011 08:34:13

Author: Anthony Lapinski

Subject: Re: convection

Post:

Thanks! Is that 1 part shampoo to 10 parts water?

Do shampoo companies really change the formula that often? Slight
variations, I imagine.

tap-l@lists.ncsu.edu writes:
>Shampoo companies change the formulations twice a year at least.
>Just so they can say "new" on the label.
>Look for Glycerol Stearate on the contents.
>
>We use it as flowvis solution mixed 1/10 with water in the heated pie
>pan convection visualization experiments.
>
>Paul D
>
>
>
>On Feb 20, 2011, at 7:02 PM, Anthony Lapinski wrote:
>
>> Are there shampoos that are made with this sort of thing? Anyone know of
>> particular brands?
>>
>>
>> tap-l@lists.ncsu.edu writes:
>>> use Rheoscopic Fluid for flow visualization Great stuff!! available
>>> from www.novostar.com --- Wolfgang
>>>
>>>
>>>
>>> On Feb 17, 2011, at 4:22 PM, Anthony Lapinski wrote:
>>>
>>>> I am looking for an easy way to show convection in water. In the past
>I
>>>> put a beaker of water halfway on a hot plate. Turn it on and maybe 10
>>>> minutes later add a drop of food coloring. This is hit or miss
>depending
>>>> on the amount of water, when the heat is turned on, etc. Plus the
>drops
>>>> sinks slowly.
>>>>
>>>> Was thinking about using "heavy" particles that are insoluble in water
>>>> (e.g., sulfur, flour, etc.) and just heat the entire beaker. Does
>anyone
>>>> have good ideas for this?
>>>>
>>>
>>>
>>
>>
>
>



From tap-l-owner@lists.ncsu.edu Mon Feb 21 09:08:12 2011

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