Question

define dimensional analysis, unit error, precision, accuracy,significant figure and Physical quantity
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Answer 1

Explanation:

dimensional analysis :- analysis using the fact that physical quantities added to or equated with each other must be expressed in terms of the same fundamental quantities (such as mass, length, or time) for inferences to be made about the relations between them.

unit error:-A unit of analysis error occurs when the units used in the analysis of the results of a study (e.g. individuals) are different from the units of allocation to the treatment comparison groups (e.g. clusters).

precision:-Precision is defined as 'the quality of being exact' and refers to how close two or more measurements are to each other, regardless of whether those measurements are accurate or not. It is possible for precision measurements to not be accurate.

accuracy :-Accuracy is defined as 'the degree to which the result of a measurement conforms to the correct value or a standard' and essentially refers to how close a measurement is to its agreed value

significant figure :-Only those figures or digits of a numerical quantity which are the result of actual measurement are said to be significant. For example, if you measure the thickness of a coin, you can write it as. 1.6 mm or 0.16 cm or 0.0016 m.

physical quantity :- A physical quantity is a property of a material or system that can be quantified by measurement. ... For example, the physical quantity mass can be quantified as n kg, where n is the numerical value and kg is the unit.