Gene Mechtly wrote in USMA 21039:
on page 121 of the BIPM Brochure, we find that the joule is
>*defined* as the newton meter, not as the watt second, as you imply.
>
>The watt second, an equivalent but less fundamental form of the joule,
>and the watt hour, not even a coherent SI form, are not even mentioned
>in this CIPM Resolution of 1946.
>
>Contrary to your implication, Bob does not assert that the joule, the
>watt, and the watt second are exclusively for electrical applications.
>
>Bob's statements are clear. The joule is preferred for all forms
>of energy. However, Bob would "allow" the watt hour only for its
>traditional use; for the measurement of *electrical* energy.
>
>If I had the authority, I would declare the watt hour illegal by a date
>certain for any kind of energy bought or sold in interstate commerce.
I prefer to express the joule as the watt second because the watt is more
familiar to the ordinary person than the newton.
1 joule = 1 newton metre, i.e. an SI derived unit X an SI base unit
1 joule = 1 watt second, i.e. an SI derived unit X an SI base unit
The hour is a non-SI unit accepted for use with the International System.
Joseph B.Reid
17 Glebe Road West
Toronto M5P 1C8 Tel. 416 486-6071
