18. in a solid conductor such as a metal, what is the cause of an electric current? a. a flow of positive and negative charges. b. a flow of positive charges only. c. +a flow of negative charges only. d. a flow of protons. e. a flow of neutrons.

In order for the bug to fly through the air a force has to push the bug forward. identify this force. how does the bug produce

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created or , but it can be

A2.0 μf capacitor and a 4.0 μf capacitor are connected in series across a 0.827-kv potential. the charged capacitors are then disconnected from the source and connected to each other with terminals of like sign together. find the voltage across each capacitor.