The International System of Units
Is the modern form of the metric system.
quantities that can be measured
basic quantities which are independent of one another
quantities that are calculated from two or more measurements.
Conversion of units
The simplest way to convert one unit to another is to form a conversion ratio with the desired unit on the numerator and the unit to be converted at the denominator.
Random Errors and Systematic Errors
Two types of errors
This results from unpredictable or inevitable changes during data measurement
This usually come from the measuring instrument or in the design of the experiment itself.
Refers to the closeness of a measured value to the expected or true value of a physical quantity
Represents consistent independent measurements of the same quantity are to one another
Indicates the range of value within which the measurement is asserted to lie with some level of confidence
Absolute uncertainty and relative uncertainty
Types of uncertainty
Usually based on the least count of the measuring device
A dimensionless and is obtained by dividing the absolute uncertainty by the numerical or measured value
Classical physics, modern physics, nuclear physics, atomic physics, geophysics, biophysics, thermodynamics, astrophysics, acoustics, optics, mechanics
Branches of Physics