9.1.4: Physical Constants, Units, Del Operator Last updated Mar 8, 2021 Save as PDF 9.1.3: Waves 9.1.4.1: Physical Constants Page ID34047 Johan Wevers ( \newcommand{\kernel}{\mathrm{null}\,}\) 9.1.4.1: Physical Constants9.1.4.2: Prefixes for Powers of 109.1.4.3: SI Units9.1.4.4: The Del-operator