Corrugated cardboard has two main components: the linerboard and the medium. Both are made of a special kind of heavy paper. Linerboard is the flat facing that adheres to the medium. The medium is the wavy fluted paper in between the liners. Single Wall is manufactured with the medium between two sheets of linerboard. Double Wall has three sheets of linerboard with two mediums in between.
A new Microsoft-commissioned survey shows European girls lose interest in STEM subjects around the age of 15. Microsoft admitted it doesn't have a comprehensive explanation for why 15-year-old girls lose interest in science and math.
When do Girls Stop Growing? Girls hit their maximum growth spurt before menstruation begins, generally getting their first period around 12 1/2 years of age. Once their period starts, girls typically gain another 1 to 2 inches in height, reaching their full adult height by age 14 or 15. However there is a very broad range of time in which girls hit puberty-related growth spurts.