Its pH changes very little when a small or moderate amount of strong acid or base is added to it and thus it is used to prevent changes in the pH of a solution. Buffer solutions are used as a means of keeping pH at a nearly constant value in a wide variety of chemical applications.
The Wizard of Oz movie musical premieres in Oconomowoc, Wisconsin. The Wizard of Oz, starring Judy Garland and featuring words and music by E.Y. âYipâ Harburg and Harold Arlen, receives its world premiere in Oconomowoc, Wisconsin, on this day in 1939.
Examples and Observations. 1  In the opening of The Wizard of Oz, set in Kansas, the transformation of Miss Gulch into a witch on a broomstick foreshadows her reappearance as Dorothy's enemy in Oz. 2  The witches in the opening scene of Shakespeare's Macbeth foreshadow the evil events that will follow.