Review: Chapter 3

Significant Figures:
-measured or meaningful digits.
-can be precisedif there are many of them.
e.g 24.37  24.6

Accuracy:
-It is how close the measurement (or average measurement) comes to the accepted or real value.

Precision:
-It is how reproducible a measurement is compare to other similar measurements.

Absolute Uncertainty:
-the uncertainty expressed in the units of measurement, not as a ratio.

Relative Uncertainty:


-Relative Uncertainty =         Absolute Uncertainty
                                       ———————————
                                        Estimated Measurement


Density:
-defined as its mass per unit volume.

-formula of density:             Mass
                         D    =     ————
                                       Volume