physics quiz 1 terms (from the book) (if merong terms sa quiz) + fundamental units

Physics

deals with the interaction of matter, force, and energy

Physical Quantities

can be fundamental or derived

Fundamental Quantities

are basic quantities that are independent of one another

Derived Quantities

are combinations of fundamental quantities

Scientific Notation

is a convenient and widely used method of expressing large and small numbers

Random Errors

result from unpredictable or inevitable changes during data measurement. Usually affects the precision of the measurements.

Systematic Errors

usually come from the measuring instrument or in the design of the experiment itself. These errors limit the accuracy of results.

Percent Error

is usually considered in judging the accuracy of a measurement

Percent Difference

is a measure on how far apart the different measured values are from each other, and is therefore an indication of precision

Variance

measures the squared deviation of each number in the set from the mean

A Variance of Zero

all measurements are identical

Small Variance

indicates that the values are close to one another, meaning they are precise

Standard Deviation

it is a measure on how diverse or spread out are a set of measurements from their average, and also the square root of the variance

A Large Standard Deviation

the measurements are very diverse

Uncertainty

indicates the range of values within which the measurement is asserted to lie with some level of confidence

Absolute Uncertainty

has the same unit as the quantity itself

Relative Uncertainty

is dimensionless and is obtained by dividing the absolute uncertainty by the numerical or measured value

Least Count

is the smallest value that can be read from any measuring device

Meter

is the speed of light in a vacuum

Mass

is the Planck constant

Time

is the cesium hyperfine splitting frequency

Temperature

is the Boltzmann constant

Electric Current

is the elementary charge

Luminous Intensity

is the luminous efficacy of monochromatic radiation

Amount of Substance

is the Avogadro constant