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.
2 Cyprus: Compulsory school age is reached by children who are five years eight months old before 1 September. Pre-primary education is compulsory for five-to six-year-olds, that is, for one year, for children who are four years and eight months old by 1 September.3 England: Children reach compulsory school age at the start of the school term following their fifth birthday, which may be in September, January or April. Wales: As in England, children reach compulsory school age at the start of the school term following their fifth birthday, which may be in September, January or April. If they turn five in September to March, they will start in the reception class (ISCED 0).