SI units and modern physical measurements

 

 I am resuming to add notes to this blog after quite a few days.


Todays topic: Measurement and Analysis.
I would like to begin with an introduction about phyiscs.Physics is defined as putting the theories of nature into mesurements.


The SI unit of mass is kilogram (kg):


The modern mass unit that is a kilogram is is based on the mass of a platinum block placed in the french bereau of measurement.

The SI unit of distance is the meter (m):
This modern assumption of distance is based on the distance travelled by light waves in 1/300000000 second(that is 300 million time of a second)

The SI unit of time  is the second (s):

The modern value of a second is based on a specific number of oscillations pf a ceasium isotope.

The above details will not be tested in  depth at exams,but it is still vital for you to remember them because they will be of great help in understanding to solve problems.