Measurements and dimensional analysis

Accuracy:

• how close a measurement is to the actual value

• how close measurement are to each other

• the dimensional analysis

Precision:

• How close your measurements are to each other

• How close measurements are to the actual value

• dimensional analysis

the density of lead is 11.34 g/cm3 is the following data found by a student accurate or precise?

11.43-11.44-11.42

• precise

• accurate

the density of lead is 11.34 g/cm3 is the following data found by a student accurate or precise?

11.55-11.34-11.04

• accurate

• precise

common error when making best fit lines

• connecting dots

• touching as many points as possible

• extending the line as far as possible

a good rule of thumb when making a best fit line?

• try to have equal number of points above and below the line

• drawing a line from the first and last dot

• not using a ruler

what is a scalar

• a measurement with only a magnitude

• a measurement with a magnitude and direction

• neither

what is a vector

• a measurement that has a magnitude and direction

• a measurement that has only a magnitude

• displacement

what is magnitude

• the great size or extent of something.

• height of something

• weight of something

what is scalar

• mass time and height

• weight distance and speed

• displacement velocity acceleration

• force and momentum