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x Area		Area is a quantity expressing the two-dimensional size of a defined part of a surface, typically a region bounded by a closed curve. The term surface area refers to the total area of the exposed surface of a 3-dimensional solid, such as the sum of...
x Length		Length is the long dimension of any object. Not to be confused with Depth which is the property of the object that appears to go away from the observer. The length of a thing is the distance between its ends, its linear extent as measured from end...
x Mass		In physics, mass (from Ancient Greek: μᾶζα) commonly refers to any of three properties of matter, which have been shown experimentally to be equivalent: inertial mass, active gravitational mass and passive gravitational mass. In everyday usage, mass...
x Volume		The volume of any solid, liquid, gas, plasma, or vacuum is how much three-dimensional space it occupies, often quantified numerically. One-dimensional figures (such as lines) and two-dimensional shapes (such as squares) are assigned zero volume in...
x Energy		In physics, energy (from the Greek ἐνέργεια - energeia, "activity, operation", from ἐνεργός - energos, "active, working") is a scalar physical quantity that describes the amount of work that can be performed by a force, an attribute of objects and...
x Frequency		Frequency is the number of occurrences of a repeating event per unit time. It is also referred to as temporal frequency. The period is the duration of one cycle in a repeating event, so the period is the reciprocal of the frequency. For cyclical...
x Time		Time is a component of the measuring system used to sequence events, to compare the durations of events and the intervals between them, and to quantify the motions of objects. Time has been a major subject of religion, philosophy, and science, but...
x Temperature		In physics, temperature is the average energy in each degree of freedom of the particles in a thermodynamic system. Because temperature is a statistical property, a system must contain a large number of particles for temperature to have a useful...
x Angle		In geometry and trigonometry, an angle (in full, plane angle) is the figure formed by two rays sharing a common endpoint, called the vertex of the angle (Sidorov 2001). The magnitude of the angle is the "amount of rotation" that separates the two...
x Force		In physics, the concept of force is used to describe how a massive body is affected by acceleration or mechanical stress. Force can also be described by intuitive concepts such as a push or pull that can cause an object with mass to change its...
x Pressure		Pressure (symbol: P) is the force per unit area applied in a direction perpendicular to the surface of an object. Gauge pressure is the pressure relative to the local atmospheric or ambient pressure. Pressure is an effect which occurs when a force...
x Speed		Speed is the rate of motion, or equivalently the rate of change of distance. Speed is a scalar quantity with dimensions length/time; the equivalent vector quantity to speed is velocity. Speed is measured in the same physical units of measurement as...
x Torque		Torque, also called moment or moment of force (see the terminology below), is the tendency of a force to rotate an object about an axis, fulcrum, or pivot. Just as a force is a push or a pull, a torque can be thought of as a twist. In more basic...
x Electric charge		Electric charge is a fundamental conserved property of some subatomic particles, which determines their electromagnetic interaction. Electrically charged matter is influenced by, and produces, electromagnetic fields. The interaction between a moving...
x Data		In computer science, data is anything in a form suitable for use with a computer. Data is often distinguished from programs. A program is a set of instructions that detail a task for the computer to perform. In this sense, data is thus everything...
x Digital image length
x Digital image area
x Power		In physics, power is the rate at which work is performed or energy is converted. It is an energy per unit of time. As a rate of change of work done or the energy of a subsystem, power is where P is power, W is work and t is time. The average power ...
x Product / service rating		A five-star scale for rating products, services, films, music, etc.
x Image magnification
x Fuel economy
x Proportion		Proportion is the relation between elements and a whole. (jvr) In architecture the whole is not just a building but the set and setting of the site. The things that make a building and its site "well shaped" include the orientation of the site and...
x Acceleration		In physics, and more specifically kinematics, acceleration is the change in velocity over time. Because velocity is a vector, it can change in two ways: a change in magnitude and/or a change in direction. In one dimension, i.e. a line, acceleration...
x Density		The density of a material is defined as its mass per unit volume. The symbol of density is ρ (the Greek letter rho). Mathematically: where: Different materials usually have different densities, so density is an important concept regarding buoyancy,...
x Electrical resistance		The electrical resistance of an object is a measure of its opposition to the passage of a steady electric current. An object of uniform cross section will have a resistance proportional to its length and inversely proportional to its cross-sectional...
x Luminous intensity		In photometry, luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle, based on the luminosity function, a standardized model of the sensitivity of the human eye. The...
x Temperature coefficient		The temperature coefficient is the relative change of a physical property when the temperature is changed by 1 K. In the following formula, let R be the physical property to be measured and T be the temperature at which the property is measured. T0...
x Magnetic moment		The magnetic moment of a system is a measure of the magnitude and the direction of its magnetism. For example, a loop of electric current, a bar magnet, an electron, a molecule, and a planet all have their own magnetic moments. Magnetic moment...
x Thermal conductivity		In physics, thermal conductivity, k, is the property of a material that indicates its ability to conduct heat. It appears primarily in Fourier's Law for heat conduction. Generally speaking, there are a number of possibilities to measure thermal...
x Heat capacity		Heat capacity (usually denoted by a capital C, often with subscripts) is a measurable physical quantity that characterizes the ability of a body to store heat as it changes in temperature. It is defined as the rate of change of temperature as heat...
x Amount of substance		In physical sciences, the amount of substance, n, of a sample can be defined informally as the number of some specified elementary entities (usually either atoms, or molecules, or ions, or electrons) present in the sample, but where this number is...
x Molar concentration		In chemistry, molar concentration (also called molarity, amount concentration or substance concentration) is a measure of the concentration of a solute in a solution, or of any molecular, ionic, or atomic species in a given volume. However, in...
x Molar energy
x Molar heat capacity
x Volumetric flow rate		The volumetric flow rate in fluid dynamics and hydrometry, (also known as volume flow rate or rate of fluid flow) is the volume of fluid which passes through a given surface per unit time (for example cubic meters per second [m s] in SI units, or...
x Molar mass		Molar mass, symbol M, is the mass of one mole of a substance (chemical element or chemical compound). It is a physical property which is characteristic of each pure substance. The base SI unit for mass is the kilogram but, for both practical and...
x Specific heat capacity		Specific heat capacity, often shortened to specific heat, is the measure of the heat energy required to increase the temperature of a unit quantity of a substance by a unit of temperature. For example, the heat energy required to raise water’s...
x Resistivity		Electrical resistivity (also known as specific electrical resistance or volume resistivity) is a measure of how strongly a material opposes the flow of electric current. A low resistivity indicates a material that readily allows the movement of...
x Specific energy		Specific energy is defined as the energy per unit mass. Common metric units are J/kg or, in basic SI units: m/s. It is an intensive property. Contrast this with energy, which is an extensive property. There are two main types of specific energy:...
x Potential difference		In the physics of electrical circuits, the term potential difference or p.d. is sometimes used as an old-fashioned synonym for the modern quantity known as "the voltage (difference) between two positions in an electrical circuit". Following the...
x Brake specific fuel consumption		Brake specific fuel consumption (BSFC) is a measure of fuel efficiency within a shaft reciprocating engine. It is the rate of fuel consumption divided by the power produced. BSFC allows the fuel efficiency of different reciprocating engines to be...
x Specific fuel consumption		Specific fuel consumption, often shortened to SFC, or TSFC is an engineering term that is used to describe the fuel efficiency of an engine design with respect to thrust output. It allows the efficiency of different sized engines to be directly...
x Electric current		Electric current can mean, depending on the context, a flow of electric charge (a phenomenon) or the rate of flow of electric charge (a quantity). This flowing electric charge is typically carried by moving electrons, in a conductor such as wire; in...

x Area

Area is a quantity expressing the two-dimensional size of a defined part of a surface, typically a region bounded by a closed curve. The term surface area refers to the total area of the exposed surface of a 3-dimensional solid, such as the sum of...

x Length

Length is the long dimension of any object. Not to be confused with Depth which is the property of the object that appears to go away from the observer. The length of a thing is the distance between its ends, its linear extent as measured from end...

x Mass

In physics, mass (from Ancient Greek: μᾶζα) commonly refers to any of three properties of matter, which have been shown experimentally to be equivalent: inertial mass, active gravitational mass and passive gravitational mass. In everyday usage, mass...

x Volume

The volume of any solid, liquid, gas, plasma, or vacuum is how much three-dimensional space it occupies, often quantified numerically. One-dimensional figures (such as lines) and two-dimensional shapes (such as squares) are assigned zero volume in...

x Energy

In physics, energy (from the Greek ἐνέργεια - energeia, "activity, operation", from ἐνεργός - energos, "active, working") is a scalar physical quantity that describes the amount of work that can be performed by a force, an attribute of objects and...

x Frequency

Frequency is the number of occurrences of a repeating event per unit time. It is also referred to as temporal frequency. The period is the duration of one cycle in a repeating event, so the period is the reciprocal of the frequency. For cyclical...

x Time

Time is a component of the measuring system used to sequence events, to compare the durations of events and the intervals between them, and to quantify the motions of objects. Time has been a major subject of religion, philosophy, and science, but...

x Temperature

In physics, temperature is the average energy in each degree of freedom of the particles in a thermodynamic system. Because temperature is a statistical property, a system must contain a large number of particles for temperature to have a useful...

x Angle

In geometry and trigonometry, an angle (in full, plane angle) is the figure formed by two rays sharing a common endpoint, called the vertex of the angle (Sidorov 2001). The magnitude of the angle is the "amount of rotation" that separates the two...

x Force

In physics, the concept of force is used to describe how a massive body is affected by acceleration or mechanical stress. Force can also be described by intuitive concepts such as a push or pull that can cause an object with mass to change its...

x Pressure

Pressure (symbol: P) is the force per unit area applied in a direction perpendicular to the surface of an object. Gauge pressure is the pressure relative to the local atmospheric or ambient pressure. Pressure is an effect which occurs when a force...

x Speed

Speed is the rate of motion, or equivalently the rate of change of distance. Speed is a scalar quantity with dimensions length/time; the equivalent vector quantity to speed is velocity. Speed is measured in the same physical units of measurement as...

x Torque

Torque, also called moment or moment of force (see the terminology below), is the tendency of a force to rotate an object about an axis, fulcrum, or pivot. Just as a force is a push or a pull, a torque can be thought of as a twist. In more basic...

x Electric charge

Electric charge is a fundamental conserved property of some subatomic particles, which determines their electromagnetic interaction. Electrically charged matter is influenced by, and produces, electromagnetic fields. The interaction between a moving...

x Data

In computer science, data is anything in a form suitable for use with a computer. Data is often distinguished from programs. A program is a set of instructions that detail a task for the computer to perform. In this sense, data is thus everything...

x Digital image length

x Digital image area

x Power

In physics, power is the rate at which work is performed or energy is converted. It is an energy per unit of time. As a rate of change of work done or the energy of a subsystem, power is where P is power, W is work and t is time. The average power ...

x Product / service rating

A five-star scale for rating products, services, films, music, etc.

x Image magnification

x Fuel economy

x Proportion

Proportion is the relation between elements and a whole. (jvr) In architecture the whole is not just a building but the set and setting of the site. The things that make a building and its site "well shaped" include the orientation of the site and...

x Acceleration

In physics, and more specifically kinematics, acceleration is the change in velocity over time. Because velocity is a vector, it can change in two ways: a change in magnitude and/or a change in direction. In one dimension, i.e. a line, acceleration...

x Density

The density of a material is defined as its mass per unit volume. The symbol of density is ρ (the Greek letter rho). Mathematically: where: Different materials usually have different densities, so density is an important concept regarding buoyancy,...

x Electrical resistance

The electrical resistance of an object is a measure of its opposition to the passage of a steady electric current. An object of uniform cross section will have a resistance proportional to its length and inversely proportional to its cross-sectional...

x Luminous intensity

In photometry, luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle, based on the luminosity function, a standardized model of the sensitivity of the human eye. The...

x Temperature coefficient

The temperature coefficient is the relative change of a physical property when the temperature is changed by 1 K. In the following formula, let R be the physical property to be measured and T be the temperature at which the property is measured. T0...

x Magnetic moment

The magnetic moment of a system is a measure of the magnitude and the direction of its magnetism. For example, a loop of electric current, a bar magnet, an electron, a molecule, and a planet all have their own magnetic moments. Magnetic moment...

x Thermal conductivity

In physics, thermal conductivity, k, is the property of a material that indicates its ability to conduct heat. It appears primarily in Fourier's Law for heat conduction. Generally speaking, there are a number of possibilities to measure thermal...

x Heat capacity

Heat capacity (usually denoted by a capital C, often with subscripts) is a measurable physical quantity that characterizes the ability of a body to store heat as it changes in temperature. It is defined as the rate of change of temperature as heat...

x Amount of substance

In physical sciences, the amount of substance, n, of a sample can be defined informally as the number of some specified elementary entities (usually either atoms, or molecules, or ions, or electrons) present in the sample, but where this number is...

x Molar concentration

In chemistry, molar concentration (also called molarity, amount concentration or substance concentration) is a measure of the concentration of a solute in a solution, or of any molecular, ionic, or atomic species in a given volume. However, in...

x Molar energy

x Molar heat capacity

x Volumetric flow rate

The volumetric flow rate in fluid dynamics and hydrometry, (also known as volume flow rate or rate of fluid flow) is the volume of fluid which passes through a given surface per unit time (for example cubic meters per second [m s] in SI units, or...

x Molar mass

Molar mass, symbol M, is the mass of one mole of a substance (chemical element or chemical compound). It is a physical property which is characteristic of each pure substance. The base SI unit for mass is the kilogram but, for both practical and...

x Specific heat capacity

Specific heat capacity, often shortened to specific heat, is the measure of the heat energy required to increase the temperature of a unit quantity of a substance by a unit of temperature. For example, the heat energy required to raise water’s...

x Resistivity

Electrical resistivity (also known as specific electrical resistance or volume resistivity) is a measure of how strongly a material opposes the flow of electric current. A low resistivity indicates a material that readily allows the movement of...

x Specific energy

Specific energy is defined as the energy per unit mass. Common metric units are J/kg or, in basic SI units: m/s. It is an intensive property. Contrast this with energy, which is an extensive property. There are two main types of specific energy:...

x Potential difference

In the physics of electrical circuits, the term potential difference or p.d. is sometimes used as an old-fashioned synonym for the modern quantity known as "the voltage (difference) between two positions in an electrical circuit". Following the...

x Brake specific fuel consumption

Brake specific fuel consumption (BSFC) is a measure of fuel efficiency within a shaft reciprocating engine. It is the rate of fuel consumption divided by the power produced. BSFC allows the fuel efficiency of different reciprocating engines to be...

x Specific fuel consumption

Specific fuel consumption, often shortened to SFC, or TSFC is an engineering term that is used to describe the fuel efficiency of an engine design with respect to thrust output. It allows the efficiency of different sized engines to be directly...

x Electric current

Electric current can mean, depending on the context, a flow of electric charge (a phenomenon) or the rate of flow of electric charge (a quantity). This flowing electric charge is typically carried by moving electrons, in a conductor such as wire; in...

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x name	x image	x article
+ Do you know something that's missing from this view? Add it!
x Area		Area is a quantity expressing the two-dimensional size of a defined part of a surface, typically a region bounded by a closed curve. The term surface area refers to the total area of the exposed surface of a 3-dimensional solid, such as the sum of...
x Length		Length is the long dimension of any object. Not to be confused with Depth which is the property of the object that appears to go away from the observer. The length of a thing is the distance between its ends, its linear extent as measured from end...
x Mass		In physics, mass (from Ancient Greek: μᾶζα) commonly refers to any of three properties of matter, which have been shown experimentally to be equivalent: inertial mass, active gravitational mass and passive gravitational mass. In everyday usage, mass...
x Volume		The volume of any solid, liquid, gas, plasma, or vacuum is how much three-dimensional space it occupies, often quantified numerically. One-dimensional figures (such as lines) and two-dimensional shapes (such as squares) are assigned zero volume in...
x Energy		In physics, energy (from the Greek ἐνέργεια - energeia, "activity, operation", from ἐνεργός - energos, "active, working") is a scalar physical quantity that describes the amount of work that can be performed by a force, an attribute of objects and...
x Frequency		Frequency is the number of occurrences of a repeating event per unit time. It is also referred to as temporal frequency. The period is the duration of one cycle in a repeating event, so the period is the reciprocal of the frequency. For cyclical...
x Time		Time is a component of the measuring system used to sequence events, to compare the durations of events and the intervals between them, and to quantify the motions of objects. Time has been a major subject of religion, philosophy, and science, but...
x Temperature		In physics, temperature is the average energy in each degree of freedom of the particles in a thermodynamic system. Because temperature is a statistical property, a system must contain a large number of particles for temperature to have a useful...
x Angle		In geometry and trigonometry, an angle (in full, plane angle) is the figure formed by two rays sharing a common endpoint, called the vertex of the angle (Sidorov 2001). The magnitude of the angle is the "amount of rotation" that separates the two...
x Force		In physics, the concept of force is used to describe how a massive body is affected by acceleration or mechanical stress. Force can also be described by intuitive concepts such as a push or pull that can cause an object with mass to change its...
x Pressure		Pressure (symbol: P) is the force per unit area applied in a direction perpendicular to the surface of an object. Gauge pressure is the pressure relative to the local atmospheric or ambient pressure. Pressure is an effect which occurs when a force...
x Speed		Speed is the rate of motion, or equivalently the rate of change of distance. Speed is a scalar quantity with dimensions length/time; the equivalent vector quantity to speed is velocity. Speed is measured in the same physical units of measurement as...
x Torque		Torque, also called moment or moment of force (see the terminology below), is the tendency of a force to rotate an object about an axis, fulcrum, or pivot. Just as a force is a push or a pull, a torque can be thought of as a twist. In more basic...
x Electric charge		Electric charge is a fundamental conserved property of some subatomic particles, which determines their electromagnetic interaction. Electrically charged matter is influenced by, and produces, electromagnetic fields. The interaction between a moving...
x Data		In computer science, data is anything in a form suitable for use with a computer. Data is often distinguished from programs. A program is a set of instructions that detail a task for the computer to perform. In this sense, data is thus everything...
x Digital image length
x Digital image area
x Power		In physics, power is the rate at which work is performed or energy is converted. It is an energy per unit of time. As a rate of change of work done or the energy of a subsystem, power is where P is power, W is work and t is time. The average power ...
x Product / service rating		A five-star scale for rating products, services, films, music, etc.
x Image magnification
x Fuel economy
x Proportion		Proportion is the relation between elements and a whole. (jvr) In architecture the whole is not just a building but the set and setting of the site. The things that make a building and its site "well shaped" include the orientation of the site and...
x Acceleration		In physics, and more specifically kinematics, acceleration is the change in velocity over time. Because velocity is a vector, it can change in two ways: a change in magnitude and/or a change in direction. In one dimension, i.e. a line, acceleration...
x Density		The density of a material is defined as its mass per unit volume. The symbol of density is ρ (the Greek letter rho). Mathematically: where: Different materials usually have different densities, so density is an important concept regarding buoyancy,...
x Electrical resistance		The electrical resistance of an object is a measure of its opposition to the passage of a steady electric current. An object of uniform cross section will have a resistance proportional to its length and inversely proportional to its cross-sectional...
x Luminous intensity		In photometry, luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle, based on the luminosity function, a standardized model of the sensitivity of the human eye. The...
x Temperature coefficient		The temperature coefficient is the relative change of a physical property when the temperature is changed by 1 K. In the following formula, let R be the physical property to be measured and T be the temperature at which the property is measured. T0...
x Magnetic moment		The magnetic moment of a system is a measure of the magnitude and the direction of its magnetism. For example, a loop of electric current, a bar magnet, an electron, a molecule, and a planet all have their own magnetic moments. Magnetic moment...
x Thermal conductivity		In physics, thermal conductivity, k, is the property of a material that indicates its ability to conduct heat. It appears primarily in Fourier's Law for heat conduction. Generally speaking, there are a number of possibilities to measure thermal...
x Heat capacity		Heat capacity (usually denoted by a capital C, often with subscripts) is a measurable physical quantity that characterizes the ability of a body to store heat as it changes in temperature. It is defined as the rate of change of temperature as heat...
x Amount of substance		In physical sciences, the amount of substance, n, of a sample can be defined informally as the number of some specified elementary entities (usually either atoms, or molecules, or ions, or electrons) present in the sample, but where this number is...
x Molar concentration		In chemistry, molar concentration (also called molarity, amount concentration or substance concentration) is a measure of the concentration of a solute in a solution, or of any molecular, ionic, or atomic species in a given volume. However, in...
x Molar energy
x Molar heat capacity
x Volumetric flow rate		The volumetric flow rate in fluid dynamics and hydrometry, (also known as volume flow rate or rate of fluid flow) is the volume of fluid which passes through a given surface per unit time (for example cubic meters per second [m s] in SI units, or...
x Molar mass		Molar mass, symbol M, is the mass of one mole of a substance (chemical element or chemical compound). It is a physical property which is characteristic of each pure substance. The base SI unit for mass is the kilogram but, for both practical and...
x Specific heat capacity		Specific heat capacity, often shortened to specific heat, is the measure of the heat energy required to increase the temperature of a unit quantity of a substance by a unit of temperature. For example, the heat energy required to raise water’s...
x Resistivity		Electrical resistivity (also known as specific electrical resistance or volume resistivity) is a measure of how strongly a material opposes the flow of electric current. A low resistivity indicates a material that readily allows the movement of...
x Specific energy		Specific energy is defined as the energy per unit mass. Common metric units are J/kg or, in basic SI units: m/s. It is an intensive property. Contrast this with energy, which is an extensive property. There are two main types of specific energy:...
x Potential difference		In the physics of electrical circuits, the term potential difference or p.d. is sometimes used as an old-fashioned synonym for the modern quantity known as "the voltage (difference) between two positions in an electrical circuit". Following the...
x Brake specific fuel consumption		Brake specific fuel consumption (BSFC) is a measure of fuel efficiency within a shaft reciprocating engine. It is the rate of fuel consumption divided by the power produced. BSFC allows the fuel efficiency of different reciprocating engines to be...
x Specific fuel consumption		Specific fuel consumption, often shortened to SFC, or TSFC is an engineering term that is used to describe the fuel efficiency of an engine design with respect to thrust output. It allows the efficiency of different sized engines to be directly...
x Electric current		Electric current can mean, depending on the context, a flow of electric charge (a phenomenon) or the rate of flow of electric charge (a quantity). This flowing electric charge is typically carried by moving electrons, in a conductor such as wire; in...