Based on Coulomb's law, why can electrostatic force be either attractive or repulsive?

Which lists the main components of darwin’s theory of evolution? a. random mutations drive evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms do not change. b. natural selection drives evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms change over time. c. natural selection drives evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms change over time. d. random mutations drive evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms do not change.

The force needed to overcome static friction is usually less than that needed to overcome kinetic friction.true or false?

What equation is used to calculate the weight of an object on a plant ?