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.
4 Scotland: Compulsory education starts at age five, although many children start at four because schools have a single intake at the beginning of the school year. Local authorities set a cut-off date (normally 1 March) defining the cohort of children eligible to start school at the beginning of the following school year (normally in August).