Physics is about trying to find the simple laws that describe all natural phenomena using a vast range of mass, length, and time scales. These scales are defined by systems of units that are built up ...Physics is about trying to find the simple laws that describe all natural phenomena using a vast range of mass, length, and time scales. These scales are defined by systems of units that are built up from a small number of base units, which are set by accurate and precise measurements of conventionally chosen base quantities. Accuracy refers to how close a measured value is to an accepted reference value while precision refers to how close the agreement is between repeated measurements.
