Units and Measurements: Conversions, Significant Figures, and Errors

Study Notes

The text discusses various aspects of units, measurements, and physical quantities.
"Measurement" comes from the Greek word "metron," meaning "limited proportion."
Metric and Imperial units have different systems of measurement, with metric units being easier to convert.
The SI Unit System, also known as the International System of Units, defines both units and prefixes.
The SI Unit System has seven basic units: A (ampere), K (kelvin), m (meter), cd (candela), mol (mole), s (second), and kg (kilogram).
Fundamental quantities are the basis for expressing all other quantities and include mass, length, time, electric current, temperature, amount of substance, and luminous intensity.
Derived units are calculated from two or more measurements.
Significant figures indicate the precision or confidence in a measurement.
Rules for significant figures include considering zeros' significance and the decimal point's position.
Scientific notation simplifies expressing very large or very small numbers.
Scientific notation rules require the base to be 10, the exponent to be a non-zero integer, and the coefficient to carry the significant digits.
Systematic errors are errors that affect the accuracy of data from experiments and can be due to system or instrument issues.
Random errors are errors due to unpredictable variations in performance and can be reduced by taking multiple readings and improving the instrument's sensitivity.

Description

Test your knowledge of units, measurements, unit conversion, significant figures, rounding off, scientific notation, computations in scientific notation, sources and types of measurement errors, and the differences between metric and imperial systems.