Archimedes principle states

Which safety measures should you follow during a thunderstorm? check all that apply. (a) avoid touching anything that conducts electricity. (b) avoid touching a person who has been struck by lightning. (c) go outside. (d) keep your computer turned off. (e) stay out of water. (f) stay inside.

In a good thermo flask the main cause of heat loss is

Explain why electric current cannot exist if a current doesn't have a voltage source.