capacitor http://t.co/OWN1VuDF
pascal (PA) http://t.co/aqVR8QJ5
atomic number or proton number… http://t.co/DvKZlHnF
Avogadro’s number http://t.co/R7EmC7L4
control rod http://t.co/Soghva9Y
control rod http://t.co/Soghva9Y
centre of gravity http://t.co/vJtx7Vqu