Conducting some experiments in the laboratory and proving the physical constants related to such as the acceleration constant of gravity, the density of some solids, the specific temperature of a solid body and finding a liquid viscosity, as the experimental results include some errors related to the experimental conditions and the incompleteness of measurement methods and physical devices, it is impossible to obtain the values with absolute accuracy, and therefore the possible errors that occur in the experiment play a decisive role in the validity of the experimental work, when comparing the experimental results with the laws Theory, the theoretical aspect related to the experiment is given at the beginning and then the experiment is applied in practice
