Is there a common in denominator for elastic shocks, completely inelastic shocks and explosions?

Based on the graph, how would you describe the net forces acting on the moving object? a) net force equals zero. b) net force is greater to the right. c) there is no way to determine net force. d) net force is positive and to the right.

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection

If a substance is in the gas phase, which of qualities of the gas will stay constant? a: volume b: mass c: shape d: position of particles