A science-fair radio uses a homemade capacitor made of two 39.51 cm × 39.51 cm sheets of aluminum foil separated by a 0.51-mm-thick sheet of paperWhat is its capacitance?
(1) heavy metal (2) pollution
Black SabbathBut why do you call it pollution?
The relative permittivity (Er) of paper will be between 1.5 and 3 (see first link), so use an average of about 2.2 (Wikipedia reckons 3.85 in the link below but that is too high in my view) So the capacitance C is C EoErA/d C 8.8510^-12 2.2 (0.3951)^2 / 5.110^-4 F C 5.96 10^-9 F C 5.96 nF
