Will upvote every question! multiple choice question!

what is not a possible sign of a chemical change?
a. heat given off
b. color change
c. light given off
d. a change of state

i'm pretty sure it would be B.

hope it helps.

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

the electric field is a “force field” around a charged object that illustrates the direction the electric force would push an imaginary