Physics Lesson 1.2.3 - Time

Please provide a rating, it takes seconds and helps us to keep this resource free for all to use

Welcome to our Physics lesson on Time, this is the third lesson of our suite of physics lessons covering the topic of Length, Mass and Time, you can find links to the other lessons within this tutorial and access additional physics learning resources below this lesson.

Time

By definition, Time is the indefinite continued progress of existence and events that occur in an apparently irreversible succession from the past, through the present, into the future. Time is measured by using clocks and it is particularly important when we want to compare the duration of events or the intervals between them. It is also used to quantify the rates of change of several physical quantities. Time is considered as the fourth dimension, along with three spatial dimensions (length, width and height).

The unit of time in all systems of units is second (s). In scientific terms, the duration of 9192631770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of cesium-133 atoms is called one second.

Time is different from the other units of the SI system as its unit multiples do not change 10 by 10 (they do not rely on the base 10 system) but they change by multiples of 12 (the base 12 numerical system was very popular in the old times). Hence, we have:

Also, the following submultiples of second are widely used:

More Length, Mass and Time Lessons and Learning Resources

Whats next?

Enjoy the "Time" physics lesson? People who liked the "Length, Mass and Time lesson found the following resources useful:

1. Time Feedback. Helps other - Leave a rating for this time (see below)
2. Units and Measurements Physics tutorial: Length, Mass and Time. Read the Length, Mass and Time physics tutorial and build your physics knowledge of Units and Measurements
3. Units and Measurements Video tutorial: Length, Mass and Time. Watch or listen to the Length, Mass and Time video tutorial, a useful way to help you revise when travelling to and from school/college
4. Units and Measurements Revision Notes: Length, Mass and Time. Print the notes so you can revise the key points covered in the physics tutorial for Length, Mass and Time
5. Units and Measurements Practice Questions: Length, Mass and Time. Test and improve your knowledge of Length, Mass and Time with example questins and answers
6. Check your calculations for Units and Measurements questions with our excellent Units and Measurements calculators which contain full equations and calculations clearly displayed line by line. See the Units and Measurements Calculators by iCalculator™ below.
7. Continuing learning units and measurements - read our next physics tutorial: Significant Figures and their Importance

Help others Learning Physics just like you

Please provide a rating, it takes seconds and helps us to keep this resource free for all to use

We hope you found this Physics lesson "Length, Mass and Time" useful. If you did it would be great if you could spare the time to rate this physics lesson (simply click on the number of stars that match your assessment of this physics learning aide) and/or share on social media, this helps us identify popular tutorials and calculators and expand our free learning resources to support our users around the world have free access to expand their knowledge of physics and other disciplines.

Units and Measurements Calculators by iCalculator™

• Significant Figures Calculator