🌈 Rainbow mind map — Time
Definition:
Time is measured by periodic events, or events that occur at regular intervals.
Quantity:
Fundamental quantity.
Units:
CGS — s, MKS — s, FPS — s, SI — s.
Common units: minute, hour, mean solar day.
Common units: minute, hour, mean solar day.
Relations:
1 min = 60 s
1 h = 60 min = 3600 s
1 mean solar day = 24 h = 86400 s
1 h = 60 min = 3600 s
1 mean solar day = 24 h = 86400 s
12-hour Clock System:
AM and PM are written after the time.
AM → between midnight and noon.
PM → between noon and midnight.
AM → between midnight and noon.
PM → between noon and midnight.
24-hour Clock System:
Time is shown by 4 digits.
00:00 to 11:59 → AM
12:00 to 23:59 → PM
Summary:
Time is a fundamental quantity measured in seconds (s) and expressed in different clock systems for daily use.
