A watch differs from a clock In its having a vibrating wheel instead of a vibrating pendulum ; and, as in a clock, gravity is always pulling the pendulum down to the bottom of its arc, which is ...

Why do we need calendars and clocks? Sabrina is helped to work out the date and the time of her opening event by her friend Tempo. She begins to see the importance of knowing the date and how a ...

A clock with hands (an analogue clock) shows us the numbers 1-12. There are 24 hours in one day, so we measure time by splitting the day into two halves. The first 12 hours of the day, from ...