Scepti - scales and pressure

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Scepti - scales and pressure
« on: August 01, 2016, 04:30:06 PM »
Scepti, can you explain why a scale would not show a weight change at different air pressure levels?

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rabinoz

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Re: Scepti - scales and pressure
« Reply #1 on: August 01, 2016, 09:22:20 PM »
Scepti, can you explain why a scale would not show a weight change at different air pressure levels?

I put this in another post. It might be a little exaggerated, but . . . . . . . . .

But of course you must use Sceptimatic's approved scales, supplied (at great expense) only by "Sceppy, Inc, Cayman Islands"[1]
 
might explain it.

[1] All payments by direct deposit into numbered bank account.
[/quote]

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Rayzor

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Re: Scepti - scales and pressure
« Reply #2 on: August 01, 2016, 11:04:26 PM »
Scepti, can you explain why a scale would not show a weight change at different air pressure levels?

In a previous life I used to do a bit of lab work, and we routinely did atmospheric buoyancy corrections when doing high precision weighing.   
Weight does vary with atmospheric pressure but only by a tiny amount due to buoyancy changes caused by airpressure and humidity variations.

We didn't have the uber-expensive sceptimatic precision laboratory scales,  we had to make do with Mettler.

Stop gilding the pickle, you demisexual aromantic homoflexible snowflake.

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neutrino

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Re: Scepti - scales and pressure
« Reply #3 on: August 01, 2016, 11:16:31 PM »
In my lab I have scales with glass box. Not sure if it's sealed though... Most probably this box is there to eliminate air flows and not atmospheric pressure:
FET is religion. No evidence will convince a FE-er. It would be easier to convince Muslims they are wrong.

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Blue_Moon

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Re: Scepti - scales and pressure
« Reply #4 on: August 01, 2016, 11:24:07 PM »
In my lab I have scales with glass box. Not sure if it's sealed though... Most probably this box is there to eliminate air flows and not atmospheric pressure:


Well, if that's a chem lab, it might be to contain volatile substances. 
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More qualified to speak for NASA than you are to speak against them

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neutrino

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Re: Scepti - scales and pressure
« Reply #5 on: August 01, 2016, 11:46:07 PM »
Anyway we went an offtopic here.
Scepti, please answer OP question.
FET is religion. No evidence will convince a FE-er. It would be easier to convince Muslims they are wrong.