Accuracy refers to how close a measured value is to the true value.

Energy is a derived quantity in the SI system and is measured in joules.

Significant figures in measurements depend on the precision of the measuring instrument.

Fundamental quantities are those which cannot be defined in terms of other quantities.

Physical constants are not affected by the choice of units.

Significant figures are counted excluding leading zeros but including trailing zeros after the decimal point.

Derived quantities are formed by combining fundamental quantities.

Significant figures represent the precision of the measured quantity.

Instrumental errors are caused by the limitations of the measuring devices.

Systematic errors occur consistently in one direction due to factors like faulty equipment.