Secondary Emissions

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“CubeSats are supposed to come down within 25 years. However, there is no enforcement of this rule.”
Electronicdesign Com Sites Electronicdesign com Files Uploads 2014 07 Ire 1962
The old-fashioned unit, cycles/second, which was helpful in solving equations by dimensional analysis, became the Hertz, which required an extra element in the equation.
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"Finally, on the Maker theme, let’s not forget the oldest Makers, the ham radio community."