A3 kg steel ball falls down vertically and strikes a floor with a speed of 12 m/s. it bounces off upward with the same speed. if the ball is in contact with the floor for 0.12 s, what is the magnitude of the average force exerted on the ball by the floor?

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.

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.

Why don't you see your reflection in water with waves or repples