Hi David,
There are two options - one is not to have asked the question, the other is to
have used the word ("about the same (dependant on temperature)" rather than
"the same" ).
Regards
Martin
-----Original Message-----
From: [email protected] [mailto:[email protected]]
Sent: 27 March 2014 21:07
To: Martin Vlietstra; U.S. Metric Association
Subject: Re: [USMA:53650] RE: SI Trivia Survey B
Martin. I am trying to educate Americans, not split hairs. Would it be better
to rephrase the question with all that hair-splitting detail?
Surely they would fall asleep! How would you more accurately ask the question?
----- Message from Martin Vlietstra <[email protected]> ---------
Date: Thu, 27 Mar 2014 20:46:54 -0000
From: Martin Vlietstra <[email protected]>
Reply-To: [email protected]
Subject: [USMA:53650] RE: SI Trivia Survey B
To: "U.S. Metric Association" <[email protected]>
> Hi David,
>
> I wish to dispute the answer to the first question. According to
> Wikipedia
> (https://en.wikipedia.org/wiki/Density_of_water#Density_of_water_and_i
> ce), water at 4 °C has a mass of 0.99970 kg. As it either gets hotter
> or
> colder, it expands, making a litre of water less than 0.99970 kg.
> Moreover, if the weighing is done in air, then then the gold displaces
> less air than water (it is more dense), so, by Archimedes principle,
> the water receives a greater upthrust due to buoyancy in air than does
> the gold.
>
> Therefore, a kilogram of gold weighs [very slightly] more than a litre
> of water.
>
> Regards
>
> Martin
>
> -----Original Message-----
> From: [email protected] [mailto:[email protected]] On
> Behalf Of [email protected]
> Sent: 27 March 2014 17:22
> To: U.S. Metric Association
> Subject: [USMA:53649] SI Trivia Survey B
>
> Second one in a series: SI Trivia Survey B: https://t.co/Vvex57DK6L
>
> David Pearl www.MetricPioneer.com 503-428-4917 David Pearl
> MetricPioneer.com 503-428-4917
----- End message from Martin Vlietstra <[email protected]> -----
David Pearl MetricPioneer.com 503-428-4917
