What happens when you touch a metal doorknob after rubbing your shoes on the carpet

Which units can be used to measure length or distance? check all that apply. gram meter kilometer liter inch

Crowbar of 5 metre is used to lift an object of 800 metre if the effort arm is 200cm calculate the force applied

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve