When energy changes from one form to another, some energy is always changed to ОА.
sound.
ОВ.
heat.
Ос.
light.
OD
electricity

OB heat

Explanation:

Hope this helps

the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.

they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.