Physical Quantities, Measurements, and Uncertainities Flashcards
A natural science based on experiments, measurements, and mathematical analysis with the purpose of finding quantitative physical laws for everything.
Physics
A uniformity and consistency in measurements with a basis of values of different quantities
Reference Standard
9,192,631,770 cycles of the microwave radiation in a lowest energy state
Cesium Atom
A new scale called __________ is used as a standard reference.
Kibble Balance
Is defined to be the mass of a cylinder of platinum-iridium alloy
1 kg
Is officially known as the “International System” or SI units.
Metric System
Are those which are distinct in nature and cannot be defined by other quantities. (length, time, and temperature)
Base Quantities
Are made up of combined base quantities such as average speed, volume, force, and energy. Need two or more base quantities to be expressed or calculated.
Derived Quantities
How many cm^2 are there in a 10m^2 area
10^5 cm^2 or 100,000 cm^2
Is the small number to the right of the 10 in a scientific notation is called _____
Exponent.
Is often in the form of N * 10^x
Scientific Notation
N can be any real number while x are multiples of 3
Engineering Notation
Refers to how closely a measured value agrees with the “correct” or “expected” value.
Accuracy
Refers to how closely individual measurements agree with each other
Precision
Defined as all digits known with certainty
Significant Figures
