Midterm Flashcards
Multiplication/division of sig figs
result should contain fewest sig figs
addition/subtraction of sig figs
results should show sig figs only as far to the right as is seen in the least precise # in the calculation
dimension
is an attribute that can be measured or quantified (length, time, mass, quantity, charge, temp)
derived dimensions
arise from multiplying or dividing other dimensions (volume, velocity, density, concentration)
unit
is a standard magnitude of a given dimension against which other magnitudes of that dimension can be compared (feet, meters, angstroms, light years, etc.)
base unit
is a unit for a fundamental, simple dimension: length, time, mass, temp, charge, etc.)
multiple unit
is defined as a multiple or a fraction of a base unit (base unit is seconds, multiple is minutes, hours, days, milliseconds, microseconds, etc.)
derived unit
is defined by multiplying or dividing base units and multiple units. (all units of force are derived)
dimensional homogeneity
an eq is said to be dimensionally homogeneous if all additive terms on both sides of the eq. are the same dimension
interpolation
unknown value is between two the reference points
extrapolation
unknown value is outside the two reference points (less accurate)
model interpolation
data driven prediction, predicts unknown values between points in a graph or table
r^2 = 1
coefficient determination: perfect fit
r = 1
perfectly correlated w/ positive slope
r = 0
no correlation between variables
