Dimensions of Physical Quantities
The nature of physical quantities is described by its dimensions. All the physical quantities represented by derived units can be expressed in terms of...
Significant Figures
Significant Figures: As discussed above, every measurement involves errors. Thus, the result of measurement should be reported in a way that indicates the precision...
Combination of Errors
The combination of Errors:
Error of A Sum or A Difference
Error of A Product or A Quotient
...
Absolute, Relative, and Percentage Error
Arithmetic Mean or Average Value:
Let the value obtained in n measurements are a1, a2, a3...., an. Then, the Arithmetic Mean or Average Value of...
Accuracy, Precision and Errors
Error:
The result of every measurement by any measuring instrument contains some uncertainty. This uncertainty is called error. Every calculated quantity which is based on...
Measurement of Mass and Time
Measurement of Mass:
Mass is a basic property of matter. It does not depend on the temperature, pressure or location of the object in space....
Measurement of Length
Measurement of Length:
You are already familiar with some direct methods for the measurement of length.
For example, a meter scale is used for lengths from...
Measurement, SI units and System of Units
The comparison of any physical quantity with its standard unit is called measurement.
Physics is a quantitative science, based on measurement of physical quantities. Certain...