Aplastic rod is charged up by rubbing a wool cloth, and brought to an initially neutral metallic sphere. it is allowed to touch the sphere for a few seconds, and then is separated from the sphere by a small distance. after the rod is separated, the rodis attracted to the sphere. is repelled by the sphere. feels no force due to the sphere.

What should the power status of a circuit be when measuring resistance with an ohmmeter?

Avehicle has an oil leak that is causing the entire oil pan to be wet, but inspection reveals no exact source after cleaning off the oil residue. technician a says to install a fluorescent dye in the crankcase and operate the engine, then re-inspect for leaks with a special light (black light). technician b says the oil leak may be coming from a source at the top of the engine, such as a valve cover gasket. who is correct?

Gunpowder residue is most likely to show up where on a shooters hands