[USMA 289] Re: Puzzled

PAR is explained here: http://www.vernier.com/products/sensors/solar-radiation-sensors/par-bta/ I also see it related to aquarium lighting like here: http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=30196=03csesz=3474=AA_6C15C=53000515177888 I am not defending the author of the

[USMA 288] Re: Puzzled

It might be the energy dissipated in air by the arc.  Once the arc is struck, the voltage drop (per meter) is relatively low, MUCH less than the initial brekdown voltage. From: Stanislav Jakuba To: U.S. Metric Association Sent: Wednesday,

[USMA 287] Re: Puzzled

I found this: http://www.pnet.sr.unh.edu/subpages/radconvert.html They probably forgot the square. John Altounji One size does not fit all. Social promotion ruined Education. http://bit.do/tounj From: USMA [mailto:usma-boun...@colostate.edu] On Behalf Of Stanislav Jakuba Sent: Wednesday,

[USMA 286] Puzzled

*Below is a quote from a scientific paper about measurements of energy in an average lighting strike. My question: What's* MJ/m? Stan "The energy released by lightning is measured in megajoules, also expressed as MJ/m." “For example a single megajoule is equivalent to about 200 food calories, or

[USMA 285] Re: ISO Standards

The BIPM recommendation is that we use either the period or the comma for the decimal marker and use a space for the thousand separator. This is published in the US by the NIST. And elsewhere by each countries standards bureau. 57 countries have adopted this standard, but few seem to use it.