The time for one complete cycle, a left swing and a right swing, is called the period. The period depends on the length of the pendulum, and also to a slight degree on the amplitude, the width of the pendulum's swing.he period of swing of a simple gravity pendulum depends on its length, the local strength of gravity, and to a small extent on the maximum angle that the pendulum swings away from vertical, Î¸0, called the amplitude.
Compulsory elementary schooling was formally introduced in Sweden in 1842. A process of reform, destined to take many years, began in the 1940's with the aim of expanding compulsory schooling.
In 1939 the government considered raising the leaving age again to 15, but this was delayed due to the onset of World War Two. The Education Act 1944 did succeed in extending compulsory education to 15, and this took effect from 1947.More significantly, the 1944 Act created the grammar school system. All 11-year-olds were required to sit the 11-plus examination, which placed them in either an academic grammar school or a secondary modern.nder the Elementary Education (School Attendance) Act 1893 it was increased to 11 and the right to education was extended to deaf and blind children. In 1899 the leaving age was increased again to 13.