explain that All the units of electricity and magnetism are derived from the meter, kilogram, coulomb and second. Till exempel, the volt is defined, such as if an electric charge of 1 coulomb changes electric potential by 1 volt, there is energy exchange of 1 joule. As a consequence, an electrical current of 1 amp thru 1 volt for 1 sec delivers energy of 1 joule, which is the kinetic energy of 2 kg moving at 1 m/s. Similarily, the unit of magnetic field, 1 tesla is defined as if an electric charge of 1 coulomb is moving at a velocity of 1 m/s perpendicular to a magnetic field of 1 tesla, it experiences a force of 1 newton perpendicular to both the magnetic field and velocity vectors. Einstein's famous equation, E = m x c^2 works only in metric: m is in Kg, c = 3 x 10^8 m/s , E = energy in joules, 1 wh = 3600 (watt-sec or joules). 1 more reason to dump the stupid moronic idiotic foot/pound system and switch to metric. Thus in the metric system, 1 Kg of matter that gets completely converted into energy, would generate 9 x 10^16 Joules or (9 x 10^16/3600000) = 2.5 x 10^10 KWH To apply Einstein's famous equation in non-metric units, the unit of energy would be defined as the kinetic energy of 2 units of mass moving at a speed of 1 unit of length/sec and the speed of light in vacuum expressed in units of length/sec. Since we already have 1 Volt x 1 Amp x 1 sec = 1 Joule of electrical energy, for non-metric units, you would have to define another obscure unit. These are objective facts.
Den fre 7 feb. 2020 11:47Pierre Abbat <[email protected]> skrev: > I'm at the North Carolina surveyors' conference and someone talked about > the > abolition of the survey foot. He would prefer going completely metric, as > would I, but most surveyors here would rather switch to the international > foot. How can we encourage surveying in metric (I mean labeling surveys in > meters, we already talk about geoid height, changes to datums, and GPS > poles > in meters)? > > Pierre > -- > Don't buy a French car in Holland. It may be a citroen. > > > > _______________________________________________ > USMA mailing list > [email protected] > https://lists.colostate.edu/cgi-bin/mailman/listinfo/usma >
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