The anteroposterior full-spine films (Fig. 6.38) exhibit several lateral flexion-type subluxations (C-3) and a rotational type at the level of L5 (C-4). This patient presented with a history of acute pain in the left lateral rib cage about the level of the 3rd and 4th ribs.
paper burning is a chemical change. technically any chemical change is also a physical change, but not every physical change is a chemical change. It is a chemical change. When you burn paper, you see smoke and ash being formed, indicating a chemical change.
What happens to substances or materials that undergo physical and chemical changes? That depends on which change. Physical changes may result in a change in appearance, but never a change in composition. Ripping, folding, melting, boiling, dissolving, and câ¦rumpling are examples of physical changes. After all of these, the substance is still made of the same atoms/elements. A chemical change will change both the appearance and composition of the matter. Examples of this are burning and reacting with acid.