Time on a 24-hour clock is always expressed in

The speed of a car is measured in

The first device for measuring time were:

How many years are there in a millennium?

The 12-hour clock uses

How many seconds in one minute?

The standard unit for measuring time is the

In a 24 hour clock 3.00 pm will be written as

An object travelling equal distance in equal intervals of time is called

1 century =