Time (Time)
Time is a fundamental physical quantity representing the continuum in which events occur in irreversible succession from the past through the present to the future. It measures duration, sequence, and rates of change in physical systems. The base unit of time in the International System of Units (SI) is the second, defined modernly using atomic transitions. In daily life and scientific fields, time is also commonly expressed using non-SI traditional units such as minutes, hours, days, and calendar years.
- Years3.17×10⁻¹¹
- Months3.8×10⁻¹⁰
- Weeks1.65×10⁻⁹
- Days1.16×10⁻⁸
- Hours2.78×10⁻⁷
- Minutes (minute)1.67×10⁻⁵
- Seconds (s)1×10⁻³
- Milliseconds (ms)1
- Microseconds (µs)1,000
- Nanoseconds (ns)1,000,000