Ch. 2 Data Analysis Flashcards
Second
The microwave frequency given off by a cesium - 133 atom
Meter
The distance that light travels through vacuum in 1/299 792 458 second
Kilogram
A platinum - iridium cylinder that is stored at constant temperature and humidity
Cubic meter
A cube whose sides all measure exactly one meter
Centi
C, 1/100
Kilo
K, 1000
Milli
M, 1/1000
1 kg = g?
1000 g = 1kg
1ml = L?
1ML = 1,000,000L
1M = c ?
1m = 1,000,000c
Base unit
Is a defined unit
Derived unit
Is defined by a combo of units
Density
A ratio that compares the mass of an object
3 part process for problem solving
Analyze problem, solve, evaluate answer
How are degrees Celsius converted to kelvins ?
You add 273
Scientific notation ex:
- 61 X 10^2
2. 8 X 10^ -8
Conversion factor
A ratio of equivalent values used to describe the same quantity in different units; is always equal to 1
Dimensional analysis
A problem solving method that focuses on the units that are used to describe matter
The difference between an accepted value and an experimental value is
Error
The ratio of an error to an accepted value is
Percent error
When you calculate percent error you ignore the
Experimental values
If two measurements are very close to each other then they are
A balance that is not set to 0
Significant figures
The digits that are reported in an answer
9.66 has what ?
Two known figures and 1 estimated figure
Non - zero numbers
Are always significant
Zero place holders
Are not significant
Counting numbers
Have an infinite number of significant figures
Scientific notation you:
You remove the place holder zeros
