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- https://phys.libretexts.org/Bookshelves/Electricity_and_Magnetism/Electromagnetics_I_(Ellingson)/01%3A_Preliminary_Concepts/1.06%3A_UnitsThe term “unit” refers to the measure used to express a physical quantity
- https://phys.libretexts.org/Courses/Merrimack_College/Conservation_Laws_Newton's_Laws_and_Kinematics_version_2.0/01%3A_C1)_Abstraction_and_Modeling/1.03%3A_Units_and_StandardsSystems of units are constructed from a small number of fundamental units, which are defined by accurate and precise measurements of conventionally chosen base quantities. Two commonly used systems of...Systems of units are constructed from a small number of fundamental units, which are defined by accurate and precise measurements of conventionally chosen base quantities. Two commonly used systems of units are English units and SI units. SI units are a metric system of units, meaning values can be calculated by factors of 10. The SI base units of length, mass, and time are the meter (m), kilogram (kg), and second (s), respectively.
- https://phys.libretexts.org/Courses/Coalinga_College/Physical_Science_for_Educators_(CID%3A_PHYS_14)/17%3A_Nuclear_Physics/17.03%3A_Fundamental__ConceptsIn this section we review some notations and basic concepts in Nuclear Physics.
- https://phys.libretexts.org/Courses/Coalinga_College/Physical_Science_for_Educators_(CID%3A_PHYS_14)/02%3A_Units_Measurement_Graphing_and_Calculation/2.08%3A_MeasurementFor example, when a distance is reported as “5.2 kilometers,” we know that the quantity has been expressed in units of kilometers and that the number of kilometers is 5.2. Not only will this be confus...For example, when a distance is reported as “5.2 kilometers,” we know that the quantity has been expressed in units of kilometers and that the number of kilometers is 5.2. Not only will this be confusing to the medical professional giving the dose, but the consequences can be dire: 100 mg given three times per day can be effective as an anticonvulsant, but a single dose of 100 g is more than 10 times the lethal amount.
- https://phys.libretexts.org/Courses/Coalinga_College/Physical_Science_for_Educators_(CID%3A_PHYS_14)/02%3A_Units_Measurement_Graphing_and_Calculation/2.08%3A_Measurement/2.8.03%3A_Units_of_MeasureThe metric system is an internationally agreed-upon measurement system based on decimals or powers of 10. Scientists use a refined version called the International System of Units (abbreviated SI). In...The metric system is an internationally agreed-upon measurement system based on decimals or powers of 10. Scientists use a refined version called the International System of Units (abbreviated SI). In biology, you will often find a need to describe measurements of length, volume, mass, time, temperature or amount of substance.
- https://phys.libretexts.org/Courses/Coalinga_College/Physical_Science_for_Educators_(CID%3A_PHYS_14)/02%3A_Units_Measurement_Graphing_and_Calculation/2.08%3A_Measurement/2.8.06%3A_Converting_Units_of_AreaConverting between units of area requires us to be careful because square units behave differently than linear units.
- https://phys.libretexts.org/Courses/Kettering_University/Electricity_and_Magnetism_with_Applications_to_Amateur_Radio_and_Wireless_Technology/01%3A_Preliminary_Concepts/1.03%3A_UnitsThe term “unit” refers to the measure used to express a physical quantity. This section lists units commonly used in electricity and magnetism along with commonly used unit prefixes.
- https://phys.libretexts.org/Bookshelves/University_Physics/University_Physics_(OpenStax)/Book%3A_University_Physics_I_-_Mechanics_Sound_Oscillations_and_Waves_(OpenStax)/01%3A_Units_and_Measurement/1.03%3A_Units_and_StandardsSystems of units are constructed from a small number of fundamental units, which are defined by accurate and precise measurements of conventionally chosen base quantities. Two commonly used systems of...Systems of units are constructed from a small number of fundamental units, which are defined by accurate and precise measurements of conventionally chosen base quantities. Two commonly used systems of units are English units and SI units. SI units are a metric system of units, meaning values can be calculated by factors of 10. The SI base units of length, mass, and time are the meter (m), kilogram (kg), and second (s), respectively.
- https://phys.libretexts.org/Bookshelves/College_Physics/College_Physics_1e_(OpenStax)/01%3A_The_Nature_of_Science_and_Physics/1.02%3A_Physical_Quantities_and_UnitsPhysical quantities are a characteristic or property of an object that can be measured or calculated from other measurements. Units are standards for expressing and comparing the measurement of physic...Physical quantities are a characteristic or property of an object that can be measured or calculated from other measurements. Units are standards for expressing and comparing the measurement of physical quantities. All units can be expressed as combinations of four fundamental units. The four fundamental units we will use in this text are the meter (for length), the kilogram (for mass), the second (for time), and the ampere (for electric current). These units are part of the metric system, which
- https://phys.libretexts.org/Courses/Joliet_Junior_College/Physics_201_-_Fall_2019/Book%3A_Physics_(Boundless)/01%3A_The_Basics_of_Physics/1.5%3A_Units_and_Measurement_Redux/Units_and_StandardsSystems of units are constructed from a small number of fundamental units, which are defined by accurate and precise measurements of conventionally chosen base quantities. Two commonly used systems of...Systems of units are constructed from a small number of fundamental units, which are defined by accurate and precise measurements of conventionally chosen base quantities. Two commonly used systems of units are English units and SI units. SI units are a metric system of units, meaning values can be calculated by factors of 10. The SI base units of length, mass, and time are the meter (m), kilogram (kg), and second (s), respectively.
- https://phys.libretexts.org/Courses/Coalinga_College/Physical_Science_for_Educators_(CID%3A_PHYS_14)/02%3A_Units_Measurement_Graphing_and_Calculation/2.02%3A_Math_Review/2.2.16%3A_Converting_Units_of_AreaConverting between units of area requires us to be careful because square units behave differently than linear units.