Defining Figures
They contribute to the degree of accuracy of a value.
ex: 1.20
What is a trailing zero?
Round 448,924 to three significant digits.
449,000
106
What is 3?
The number of grams in a kilogram
What is 1000g?
Leading zeros and trailing zeros in a number without a decimal.
ex: .0047
ex: 5000
What is not a sig fig?
These come from measurements.
Where do significant figures come from?
Round 120000 to three significant digits.
(Hint: The zeros are not significant & the answer is written in scientific notation!)
1.20 x 105
600
What is 1
The process of mathematically converting measurements from one amount to another
What is Unit Conversion?
How many significant digits are in the number 10.01?
What are 4 sig figs?
These zeros:
1000073.05
3.990
What are Zeros that are significant?
4.56g x 1.4g =
6.4g
x & / rule: results should only have as many sig figs as the term with the least # of sig figs!
0.000043260
What is 5
What is 100?
The amount of numbers in the RESULT of this equation that are NOT Significant.
123450 + 123400 =
What is 1?
The counting numbers that are always significant.
What is (1,2,3,4,5,6,7,8,9) ?
123.6cm + 16.23cm =
139.8cm
+ & - rule: keep only the # of decimals in the result that are in the least precise number.
3.40 x 1035
What is 3
The number of minutes in 4 days.
What is 5760 min?
4day x 24hr x 60min
______ ______ = 5760 min
1day 1hr
theoretical value - measured result
___________________________ x100
theoretical value
What is the percent error formula?
These zeros:
400,000,000
2,3400
0.0006
What are NOT Significant Digits?
278 mi / 11.70 gal =
What is 23.8 mi/gal
x & / rule: results should only have as many sig figs as the term with the least # of sig figs!
1000 Meters / 1 KM
Doesn't actually count towards the sig figs
It is an EXACT Number
Ford Mustang Cobra Convertible - Red
What is Mrs. Krejci's car?
The number of significant figures in the number 10000
What is 1?