# Time

on . Posted in Classical Mechanics

Time, abbreviated as t, is a fundamental concept in physics and is often described as the fourth dimension.  It is a dimension in which events occur in a sequence, from the past through the present and into the future.  In physics, time is often considered to be relative and can be affected by factors such as gravity and velocity.  The passage of time can be measured using various methods, such as with a clock or with the decay of radioactive materials.

In physics, time can be used to describe the motion of objects, the behavior of waves, and the evolution of physical systems.  The concept of time is also important in many other fields, including philosophy, biology, and psychology.  It is a fundamental part of human experience and plays a crucial role in our understanding of the world around us.

### time with Displacement formula

$$t \;=\; d \;/\; s$$     (Time with Displacement)

$$d \;=\; t \; s$$

$$s \;=\; d \;/\; t$$

Symbol English Metric
$$t$$ = Time $$sec$$  $$s$$
$$d$$ = Displacement $$ft$$  $$m$$
$$s$$ = Speed $$ft \;/\; sec$$  $$m \;/\; s$$

### time with Power formula

$$t \;=\; F \; d \;/\; P$$     (Time with Power)

$$F \;=\; t \; P \;/\; d$$

$$d \;=\; t \; P \;/\; F$$

$$P \;=\; F \; d \;/\; t$$

Symbol English Metric
$$t$$ = Time $$sec$$  $$s$$
$$F$$ = Force $$lbf$$ $$N$$
$$d$$ = Displacement $$ft$$  $$m$$
$$P$$ = Power $$W$$ $$kg-m^2 \;/\; s^3$$

### time with Work formula

$$t \;=\; W \;/\; P$$     (Time with Work)

$$W \;=\; t \; P$$

$$P \;=\; W \;/\; t$$

Symbol English Metric
$$t$$ = Time $$sec$$ $$s$$
$$W$$ = Work $$lbf-ft$$ $$J$$
$$P$$ = Power $$W$$ $$kg-m^2 \;/\; s^3$$

### Time Conversion Table

MultiplyByTo get
time (seconds) 0,000 000 000 000 000 000 000 001 yoctosecond (ys)
0,000 000 000 000 000 000 001 zeptosecond (zs)
0,000 000 000 000 000 001 attosecond (as)
0,000 000 000 000 001 femtosecond (fs)
0,000 000 000 001 (trillionth) picosecond (ps)
0,000 000 001 (billionth) nanosecond (ns)
0,000 001 (millionth) microsecond (us)
0,001 (thousandth) millisecond (ms)
0.01 (hundredth) centisecond (cs)
1 second (s)
time (year) 60 seconds 1 minute (mean solar)
59.83617 seconds 1 minute (sidereal)
60 minutes 1 hour
24 hours 1 day
3,600 seconds 1 hour
86,400 seconds 1 day (mean solar)
86,164.09 seconds 1 day (sidereal)
7 days 1 week
168 hours 1 week
14 days 1 fortnight
28, 29, 30 or 31 days 1 month
365 days 1 year
366 days 1 leap year
12 months 1 year
31,536,000 seconds 1 year (calendar)
31,558,150 seconds 1 year (sidereal)
31,556,930 seconds 1 year (tropical)
9,460,550,000,000,000 meters 1 light year
299,792,458 meters per sec (m/s) speed of light
parsec approx. 3.25 light years
time (years) biennial 2
triennial 3
quinquennial 5
hexennial 6
septennial 7
octennial 8
novennial 9
decennial 10
hendecennial 11
duodecennial 12
tredecennial 13
quindecennial 15
sextodecennial 16
septendecennial 17
vigintennial 20
trigentennial 30
quinquagenary 50
sexagennial 60
septuagennial 70
octogintennial 80
nonagintennial 90
centennial 100
sesquicentennial 150
bicentennial 200
tercentennial 300
quatercentenary 400
quincentennial 500
sexcentennial 600
septcentennial 700
octocentennial 800
nanacentennial 900
millenial 1,000