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Physical quantities

This list has 43 sub-lists and 60 members. See also Quantity, Metrology, Concepts in physics, Physical properties
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Time
Time 44 L, 17 T
Energy
Energy 34 L, 19 T
Force
Force 7 L, 19 T
Visibility
Visibility 2 L, 7 T
Entropy
Entropy 3 L, 3 T
Density
Density 7 L, 3 T
Acceleration
Acceleration 2 L, 6 T
Electric charge
Electric charge 1 L, 1 T
Power (physics)
Power (physics) 12 L, 5 T
Size
Size 15 L, 2 T
Voltage
Voltage 5 L, 5 T
Distance
Distance 6 L, 3 T
Moment (physics)
Moment (physics) 6 L, 8 T
Angular momentum
Angular momentum 2 L, 1 T
Momentum
Momentum 1 L, 2 T
  • Speed
    Speed Magnitude of velocity
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    rank #1 ·
    In everyday use and in kinematics, the speed of an object is the magnitude of its velocity (the rate of change of its position); it is thus a scalar quantity. The average speed of an object in an interval of time is the distance travelled by the object divided by the duration of the interval; the instantaneous speed is the limit of the average speed as the duration of the time interval approaches zero.
  • Time
    Time Dimension in which events can be ordered from the past through the present into the future
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    rank #2 ·
    Time is the indefinite continued progress of existence and events that occur in an apparently irreversible succession from the past, through the present, to the future. Time is a component quantity of various measurements used to sequence events, to compare the duration of events or the intervals between them, and to quantify rates of change of quantities in material reality or in the conscious experience. Time is often referred to as a fourth dimension, along with three spatial dimensions.
  • Torque Physics concept
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    rank #3 ·
    Torque, moment, moment of force or "turning effect" is the rotational equivalent of linear force. The concept originated with the studies by Archimedes of the usage of levers. Just as a linear force is a push or a pull, a torque can be thought of as a twist to an object. Another definition of torque is the product of the magnitude of the force and the perpendicular distance of the line of action of force from the axis of rotation. The symbol for torque is typically τ {\\displaystyle {\\boldsymbol {\\tau }}} , the lowercase Greek letter tau. When being referred to as moment of force, it is commonly denoted by M.
  • Heat
    Heat Thermodynamic energy transfer, other than by thermodynamic work or by transfer of matter
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    rank #4 ·
    In thermodynamics, heat is energy in transfer to or from a thermodynamic system, by mechanisms other than thermodynamic work or transfer of matter. The mechanisms include conduction, through direct contact of immobile bodies, or through a wall or barrier that is impermeable to matter; or radiation between separated bodies; or isochoric mechanical work done by the surroundings on the system of interest; or Joule heating by an electric current driven through the system of interest by an external system; or a combination of these. When there is a suitable path between two systems with different temperatures, heat transfer occurs necessarily, immediately, and spontaneously from the hotter to the colder system. Thermal conduction occurs by the stochastic (random) motion of microscopic particles (such as atoms or molecules). In contrast, thermodynamic work is defined by mechanisms that act macroscopically and directly on the system's whole-body state variables; for example, change of the system's volume through a piston's motion with externally measurable force; or change of the system's internal electric polarization through an externally measurable change in electric field. The definition of heat transfer does not require that the process be in any sense smooth. For example, a bolt of lightning may transfer heat to a body.
  • Frequency Number of occurrences or cycles per unit time
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    rank #5 ·
    Frequency is the number of occurrences of a repeating event per unit of time. It is also referred to as temporal frequency, which emphasizes the contrast to spatial frequency and angular frequency. The period is the duration of time of one cycle in a repeating event, so the period is the reciprocal of the frequency. For example: if a newborn baby's heart beats at a frequency of 120 times a minute, its period, T, — the time interval between beats—is half a second (60 seconds divided by 120 beats). Frequency is an important parameter used in science and engineering to specify the rate of oscillatory and vibratory phenomena, such as mechanical vibrations, audio signals (sound), radio waves, and light.
  • Cubic foot Imperial and US customary (non-metric) unit of volume
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    rank #6 ·
    The cubic foot (symbol ft) is an imperial and US customary (non-metric) unit of volume, used in the United States, and partially in Canada, and the United Kingdom. It is defined as the volume of a cube with sides of one foot () in length. Its volume is 28.3168 liters or about ​⁄35 of a cubic meter.
  • Solubility
    Solubility Capacity of a substance to dissolve in a solvent in a homogeneous way
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    rank #7 ·
    Solubility is the property of a solid, liquid or gaseous chemical substance called solute to dissolve in a solid, liquid or gaseous solvent. The solubility of a substance fundamentally depends on the physical and chemical properties of the solute and solvent as well as on temperature, pressure and presence of other chemicals (including changes to the pH) of the solution. The extent of the solubility of a substance in a specific solvent is measured as the saturation concentration, where adding more solute does not increase the concentration of the solution and begins to precipitate the excess amount of solute.
  • Electrical resistance and conductance
    Electrical resistance and conductance Opposition to the passage of an electric current
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    rank #8 ·
    The electrical resistance of an object is a measure of its opposition to the flow of electric current. The inverse quantity is electrical conductance, and is the ease with which an electric current passes. Electrical resistance shares some conceptual parallels with the notion of mechanical friction. The SI unit of electrical resistance is the ohm (Ω), while electrical conductance is measured in siemens (S).
  • Momentum
    Momentum Conserved physical quantity related to the motion of a body
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    rank #9 ·
    In Newtonian mechanics, linear momentum, translational momentum, or simply momentum (pl. momenta) is the product of the mass and velocity of an object. It is a vector quantity, possessing a magnitude and a direction. If m is an object's mass and v is its velocity (also a vector quantity), then the object's momentum is: p = m v . {\\displaystyle \\mathbf {p} =m\\mathbf {v} .} In SI units, momentum is measured in kilogram meters per second (kg⋅m/s).
  • Waterproofing
    Waterproofing Process of making an object or structure waterproof or water-resistant
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    rank #10 ·
    Waterproofing is the process of making an object or structure waterproof or water-resistant so that it remains relatively unaffected by water or resisting the ingress of water under specified conditions. Such items may be used in wet environments or underwater to specified depths.
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