2 covering for the human body most of the celebrants of the town's bicentennial will be in festive rigâso don't show up in jeans Synonyms apparel, attire, clobber [British slang], clothes, costumery, dress, duds, garments, gear, habiliment(s), habit [archaic], rags, raiment, clothing, rigging, threads, toggery, togs, vestiary, vestments, vesture, ...
It is therefore called the triple point of the substance, and it represents the only point in the phase diagram in which all three states are in equilibrium. Point C is the critical point of the substance, which is the highest temperature and pressure at which a gas and a liquid can coexist at equilibrium. The figure below shows what happens when we draw a horizontal line across a phase diagram at a pressure of exactly 1 atm.
At, the first derivative is, and so is the slope of the tangent line. At, the derivative and the slope are both. At, the line is horizontal, demonstrating that the derivative at this point is. Since the tangent line there has a slope of, the point is a critical point of the function. A good way to find critical points on a graph, therefore, is to find points where a tangent line would have a slope of, or where a tangent line would be vertical (this corresponds to the derivative being undefined).