8) The equilibrium state of a substance which co-exists in solid, liquid and vapour from at a single point is called

9) Two perfectly elastic spherical bodies of equal mass are at rest on a smooth horizontal table. One of the balls is given a velocity v and made to stick on the other ball. Both balls after the impact will move with a velocity

10) Number of minimum control points required to generate a quadratic B-spline curve

11) Which is positive drive?

12) An elephant is stopped by a rope wound twice around the rough trunk of a tree. If the elephant exerts a pull of 1000 kgf, the minimum force required to stop the elephant is (Coefficient of friction between the rope and the tree is 0.3)