I dont know how to do it
It's ok, that's what we are here for.
A watch is a portable clock you usually wear on your wrist that is used to indicate, keep, and co-ordinate "time". Time, of course, being a measuring system used to sequence events, to compare the durations of events and the intervals between them, and to quantify rates of change such as the motions of objects.
Taking this into account, we can start to ascribe meaning to your watch. A modern day watch that runs off a power source (not by shade) is a condensed sundial. The movement of (usually) one long stick and one short stick, correlates to a digital equivalent. If you circumscribe the end of the long stick and divide that by 12, you will get exactly 12 equidistant sections.
The *time* it takes for the little hand to traverse one of these sections we call an "hour". Traversing twenty-four sections we can conclude that one "day" has elapsed. (A day I hope you can identify as being 1 revolution of the planet you hopefully reside on (if that is still too dense for you imagine a ball of some sort blown up about a million times and imagine now that you are standing on it! AND it is spinning!!!))
If you again circumscribe the long end of the stick and divide that by 60, you will get exactly 60 equidistant sections. The *time* it takes for the BIG hand to traverse one of these sections we call a "minute". Traversing 60 of these sections, or a return from it's starting point, is equivalent to 1 hour.
In between each of these "minute" sections, we sometimes have another "stick." This stick moves in time quicker than the other two. For every revolution we say that it has been 1 minute, and the "minute stick" will have moved 1 of the 60 sections. The time it takes for this stick to move one section we call a "second".
So 1 day = 24 hours = 1440 minutes = 86400 seconds
If you are a being from another planet with complex understandings of subatomic particles, it might be easier to work the other way, and realize we define 1 second to be equivalent to the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium 133 atom at 0 degrees Kelvin or when it is effectively unperturbed by black body radiation or other energetic particles which may. If one would merely wait 794,243,384,928,000 or about 794.243 trillion periods of Cesium 133, you would have 1 day.
I hope this has cleared up your understanding of watches. Please let me know if I can be of any further assistance to you.
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