Measurements And Their Errors Flashcards
What is the error of a protractor and how do you work it out?
The error of a standard protractor is 1 degree
(0.5+-) + (0.5+-) = 1
-Due to two measurements: the zeroing measurement and value measurement (both 0.5+-) the error is double.
What is an error?
The smallest value able to be measured. It comes in the form of +/- and is a range of values that the measurement could be
What is an SI unit?
The universal system of measuring.
What is the Si unit for Speed?
ms^1
(metres divided by seconds)
What is the Si unit for a volt?
kg m^2 s^-3 A^-1
What is the equation for percentage error?
100 x Error / Measure value
What is the line of worse fit and how can you apply it into percentage errors?
The line of worse fit is the line that makes use of errors to show the steepest possible line. You can use the equation:
100 x Line of best fit gradient- Line of worse fit gradient/ line of best fit gradient
What are uncertainty bars?
Bars that visualise the uncertainty on a graph
List 6 Si units
Length
Mass
Time
Current
Temperature
Quantity of matter (mole)
What is the multiple of femto (f)
1x10^-15
What is the multiple of pico
1x10^-12
Multiple of nano oh yeah
1x10^-9
What is the multiple of micro
1 x 10^-6
What is the multiple of milli
1 x 10^-3
What is the multiple of centi
1 x 10^-2
