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What do measurements consist of?
They consist of size, units, and uncertainty
Volume is:
V = (length) l³ + m³
1 dm³ = ?
1 L
1 cm³ = ?
1 mL
Density formula is
D = m/v
SI Unit - kg/m³
Exact Numbers are?
whole, countable, integers
Inexact Numbers are?
measured values not integers
Exact numbers have?
infinite sigfigs
All non zero numbers are?
sigfigs
captive zeroes are
sigfigs
trailing zeroes are
sigfigs (but only if there is a decimal point)
Leading zeroes are
not sigfigs
Precise measurements
Values close to each other
Accurate Measurements
values close to correct one
Add/subtract rules
absolute precision
answer cannot have more digits to the right of the decimal point than any original numbers
Multiplication/Division rules
relative precision
The number of sigfigs in the answer is limited to the factor with the least number of sigfigs