What is a physical system that is isolated from its environment called? Reciprocal
Circular
Open
Closed

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

Place several e-field sensors at a few points on different equipotential lines, and look at the relationship between the electric field and the equipotential lines. which statement is true? 1-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of higher voltages. 2-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of lower voltages. 3-at any point, the electric field is parallel to the equipotential line at that point.