Cavitation wear is also known as cavitation erosion, vaporous cavitation, cavitation pitting, cavitation fatigue, liquid impact erosion and wire-drawing. Cavitation wear is a fluid-to-surface type of wear that occurs when a portion of the fluid is first exposed to tensile stresses that cause the fluid to boil, then exposed to compressive stresses that cause the vapor bubbles to collapse (implode).
Valerie Harper (born August 22, 1940) is an American actress. Harper was born in Suffern, New York. Harper is best known for her portrayal of the wise-cracking yet vulnerable Rhoda Morgenstern on two CBS television sitcoms of the 1970s: The Mary Tyler Moore Show and its spin-off Rhoda, in which she played the title role. Harper won four Emmy awards and a Golden Globe for her work as Rhoda Morgenstern on both series. She also played family matriarch Valerie Hogan on the 1980s sitcom Valerie's Family. (It was renamed The Hogan Family in 1987 after Harper left the series and was replaced by Sandy Duncan).
Biography of Harper Lee Nelle Harper Lee was born on April 28, 1926, to Amasa Coleman Lee and Frances Cunningham Finch Lee. Harper Lee grew up in the small southwestern Alabama town of Monroeville.Her father, a former newspaper editor and proprietor, was a lawyer who also served on the state legislature (1926-38).elle Harper Lee was born on April 28, 1926, to Amasa Coleman Lee and Frances Cunningham Finch Lee.