Human timescales
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- 0.1 reaction time, blinking
- 0.15 seconds -- recommended maximum time delay for telephone service
- 0.2 to 0.67 seconds -- a beat of modern dance music
- average reading or talking speed 120 words/min is 0.5 s/word
- 1/70 to 1/120 min = 0.5 to 1 s - heart rate period, frequency 2 to 1 Hertz
- Sensory memory up to 1 s.
- breathing period
- reading/talking speed, 1-5 s/sentence
- Short term memory up to 10 to 15 s
- 60 seconds = one minute
- 28,600 seconds = 8 hours -- one workday in most Western countries
- 86,400 seconds = one day = 24 hours, sleep, awake
1 E7 s, 116 days to 3.2 years:
- decade
- human generation
- 2.4 E9 seconds = 75 years -- average life span in the first world
- 3.156 E9 seconds = century