Time-minute-second conversion:
1 minute = 60 seconds, 1 hour = 60 minutes, 1 hour = 3600 seconds. Minute hand speed 12 times the hour hand speed, second hand speed 60 times the minute hand speed, and second hand speed 720 times the hour hand speed.
One hour is generally equal to 3600 seconds, or 60 minutes, or 1/24 days; The time measurement of human daily life is generally carried out in hours.
12 hour system is a time rule that divides 24 hours a day into two periods, namely, morning (before noon) and afternoon (after noon). Each time period consists of twelve hours, which are represented by the numbers 12, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,1in turn.