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.
Its youth literacy rate stands at 98%, computer literacy rate at 35%, and primary school enrollment rate at over 99%. An education system which dictates 9 years of compulsory schooling for every child is in place. The free education system established in 1945, is a result of the initiative of C. W. W. Kannangara and A. Ratnayake.