What is the longest wavelength of light, in nanometers, that will undergo destructive interference when it is shone on the oil

Which is an example of gaining a static charge by conduction? a) rubbing a balloon against your hair. b) shuffling your shoes across a carpet. c) bringing a charged rod near an electroscope. d) touching your car on a cold day and getting a shock.

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these

Does current flow through or across a resistor?