1. Compare and contrast open and closed systems.

1-4 sentences

a closed system is when everything throughout your system is closed and connected. meaning that electricity can flow though without being interrupted or stopped. And open system is when there is a gap in the line somehwrre and not connected. meaning that electricity cant go though completly becuase there is a spot in the system where it's open and being stopped. (kinda like if you were on a bridge but theres a huge hole in it so you can go to the other side)

wire in brush may conduct electricity from cell to drill and vice versa electrc shock possible

answer(20) psi;