Yes.
because normal capacitors does not have any polaririties.
Fire alarm system may be having some electronic devices and cards, in which some capacitors are used. Capacitors are part of any electronic cards.
In the case of many electronics, you can discharge any capacitors by first unplugging it (and disconnecting any batteries) and then pressing the power button. The capacitors should drain when the circuit is opened.
The capacitors those are polarity sensitive are called electrolytic and tantalum capacitors. These capacitors are labeled as positive and negative.
any differential equation would be considered a calculus equations.
Yes.
Capacitors are rated in Microfarads
A system of equations can have any number of inequalities.
Film capacitors cannot be replaced with ceramic or mica capacitors if used for analog signal processing. However, mica capacitors can be replaced with ceramic capacitors in general.
paper capacitors are non polar, so they have the same symbol as any other non polar capacitors like ceramic disc, two parallel lines.
Replaced capacitors that are no lomger capacitors.
Mostly the leakage of capacitors is due to the resistor.