Which part of the electromagnetic spectrum has a shorter wavelength than ultraviolet light?
television
x-rays
microwave
infrared light

Gamma rays have the shortest of all wavelengths but based on the options listed,X-RAYS is the answer they are looking for,not to be confused with gamma rays,those aren't an option here,it's x-rays based on option choice.

petroleum? coal maybe?

explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.