week 1-2 Flashcards
giga- (G)
10^9
mega- (M)
10^6
kilo- (k)
10^3
deci- (d)
10^-1
centi- (c)
10^-2
milli- (m)
10^-3
micro- (weird u)
10^-6
nano- (n)
10^-9
pico- (p)
10^-12
(scientific notation) move decimal to right
10^-x
(scientific notation) move decimal to left
10^x
how to convert to scientific notation?
find largest sig fig & then move decimal to right or left until largest sig fig is in ones place
all non-zero sig figs are…?
significant
sandwiched zeros are…?
significant
leading zeros are….?
not significant
trailing zeros are…?
only significant if there’s a decimal (count every 0 if there’s a decimal)
rule for addition & subtraction (sig figs)
only keep sig figs up to largest uncertain digit
rule for multiplication & division (sig figs)
keep same # of sig figs as # w/ least amount of sig figs
accuracy
how close a measure is to its true value
precision
how close a sample of measurements are to each other
what if uncertainty not given?
last valuable digit in measurement has uncertainty of 1
homogenous mixture
evenly proportioned throughout
heterogenous mixture
unevenly proportioned throughout