In this article about new scientific developments to redefine the kilogram and remove its link to a physical object, Ronnie Cohen writes about recent reports about a new scientific breakthrough in getting the most accurate estimate of Avogadro’s constant to date, which can help to redefine the kilogram. These reports have been published in the last few weeks and you can find a list of sources at the bottom of this article.
Inconsistent and confusing distances on public signs
Ronnie Cohen writes about the muddle of measurement units he has found on public signs in London, particularly those related to public transport and cycling. If two measurement systems were not bad enough, he has found there are now three.
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