Complete the statements by writing the number from the graph. The substance is in the gas phase only in region. The substance is in both the liquid and the solid phase in region. The substance is in only the liquid phase in region. The melting point is the temperature at region. The boiling point is the temperature at region.

Ateacher attaches a ball to a meter long string and whirls it around in a horizontal circle at constant speed. the teacher explains that the string is what makes the ball go in a circle. why is the string necessary? a) the string is needed to apply a torque to the ball. b) the string is needed to push on the ball to get it up to speed. c) circle motion requires an inertia which is provided by the string. d) circle motion requires a force to give it a centripetal acceleratio