Question

what is time? how did people known time when there were no clocks ? what is tha standard unit of time?​

Answer 1

Answer:

In math, time can be defined as the ongoing and continuous sequence of events that occur in succession, from the past through the present to the future. Time is a used to quantify, measure or compare the duration of events or the intervals between them, and even, sequence events.

One of the earliest of all devices to tell time was the sundial. The sundial is looked on as being a form of sun-powered clock.

second

The second, symbol s, is the SI unit of time. It is defined by taking the fixed numerical value of the cesium frequency ΔνCs