Negative charges repel positive charges. t/f if a negatively charged rod is brought close to an electroscope that is negatively charged, the two leaves will move farther apart. t/f electrical charges exist in the sea and in the air. t/f coulomb's law describes gravitational attraction t/f an insulator does not allow electrons to flow freely through it. t/f coulomb's law predicts that charged bodies may attract or repel each other. t/f electric fields have magnitude and direction. t/f an electric field is a measure of the force on a unit positive charge. t/f

The slope of a velocity time graph over any interval of time gives the during that interval

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.

How to tell if a molecule is polar or nonpolar with electronegativity