Deluged by responses to his request for your favourite units, Robert P Crease discovers that non-SI units persist, and are sometimes even popular, among the physics community Setting the standard ...

An upcoming change to SI units – due to be officially approved this month – will mark the end of a long journey from defining quantities in terms of objects to using precise, unchanging and universal ...

SI Unit: Every measurement we make, be it for length, time, temperature, or electric current, needs a standard unit so that results are understood universally. To maintain uniformity worldwide, ...

These units, together with the astronomical second (based on the mean solar day) as the unit of time, constituted a mechanical unit system. Following the introduction of the ampere, the kelvin and the ...

ICSE Physics Syllabus for Class 10: CISCE (Council for the Indian School Certificate Examinations) is a well-known examination board in India. Every year it organises ICSE and ISC examinations all ...

Earth now weighs 6 Ronnagrams as new prefixes are added to the International Systems of Measurement. Paris: International scientists gathered in France on Friday to add new metric prefixes to express ...

This is a short introductory note to the texts of lectures presented at a Royal Society Discussion meeting held on 14-15 Febrary 2005 and now published in this issue of Philosophical Transactions A.