Measurement Basics
Every measurement must contain these two things.
What are a number and a unit?
A ratio of two equivalent measurements used to change units.
What is a conversion factor?
This describes how close a measurement is to the true or accepted value.
What is accuracy?
Measured values contain all certain digits plus this many estimated digits.
What is 1?
Convert 73.2 inches to feet.
What is 6.10 ft?
The abbreviation SI means.
What is the International System of Units?
Every properly written conversion factor is mathematically equal to this number.
What is 1?
Unpredictable variation that causes repeated measurements to scatter.
What is random uncertainty?
How many significant figures are in 0.02050?
What is 4?
Convert 84,650 cm to meters.
What is 846.5 m?
The SI decimal scale is based on powers of this number.
What is 10?
Dimensional analysis treats units as though they are these.
What are algebraic quantities?
This describes how reproducible or consistent repeated measurements are.
What is precision?
Zeros between nonzero digits are ________.
What is significant?
Calculate and round correctly: 5.037 m + 0.46 m + 32.8 m − 8.20 m
What is 30.1 m?
This is the amount of fundimental SI Units.
What is 7?
One gigahertz equals this many hertz.
What is 10⁹ Hz?
An error that consistently shifts measurements in the same direction.
What is systematic uncertainty?
When adding or subtracting measurements, round according to this rule.
What is the least precise decimal place?
A sample has a mass of 52.6 g and a volume of 6.4 cm³. Find its density.
What is 8.2 g/cm³?
A mathematical combination of fundamental units is called this.
What is a derived unit?
One gram equals this many micrograms.
What is 10⁶ μg?
If the accepted length is 27.6 cm, which is more accurate: 27.7 cm or 27.9 cm?
What is 27.7 cm?
When multiplying or dividing measurements, round according to this rule.
What is the fewest significant figures?
Observed mass = 4.72 g and expected mass = 4.85 g. Calculate percent error.
What is approximately 2.7%?