Can someone explain to me what potential difference is? simple answers are always better! p. s : last time my electricity question was taken down becuase i put it in teh physics section but i believe it is physics or at least fits physics the best. people answering the question dont mind this.

Two technicians are discussing a resistance measurement between the can-h and can-l wires. technician a says this measurement should be done with the ignition switch in the "run" position. technician b states that a measurement of 0 ohms indicates an open in the network. which technician is correct?

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?

Which composition of water moves to begin a deepwater current?