Physics

physics

body of knowledge that provide organized answer to our questions about physical world

Phenomena in the physical world to physical laws to mathematical form to quantitative result

goal of physics

System of Measurements

process associating numbers with physical quantities and phenomena

Units of measurement SI units

A different base unit is used for each quantity

Significant figures

refers to the digits that were measured

Ambiguous

can’t tell whether zeroes measured or only showing decimal

Scientific notation

is a way of writing very large or very small numbers

Accuracy

closeness of a measured value to a standard or known value

Precision

closeness of two or more measurements to each other

Dimensional analysis

also known as factor label method, is a method to convert one unit to a different unit

has one factor used for measuring

measurement method of accuracy

has multiple factors for measuring

measurement method of precision

The kind of measuring device used, Methods in getting the measurement, condition in which the measurement is made

factors why errors occur in a measurement

Random error and Systematic error

types of error

random error

error that has no pattern and inconsistent

Systematic error

consisted and repeatable error

Mean

measure of central tendency of a probability distribution along median and mode

Variance

Measurement variability from the average or mean

Standard Deviation

a statistic measuring the dispersion of a dataset relative to the mean

Variance

Inversely proportional to precision