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SameMassMoreForceMoreAccel |
When objects having the same mass are acted upon by net forces of different strengths, the object acted upon by the greater force will experience a greater acceleration. |
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SameMassMoreForceMoreAccel (Copy) |
When objects having the same mass are acted upon by net forces of different strengths, the object acted upon by the greater force will experience a greater acceleration. |
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Scalar |
A scalar is a quantity that has only magnitude. |
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ScientificExplanation |
A scientific explanation includes an assertion (claim) about natural systems or designed objects, systems, or phenomena; the evidence, which consists of empirical evidence or observations, related to the claim; and reasoning that links the claim with the evidence. |
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ScientificExplanation (Copy) |
A scientific explanation includes an assertion (claim) about natural systems or designed objects, systems, or phenomena; the evidence, which consists of empirical evidence or observations, related to the claim; and reasoning that links the claim with the evidence. |
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ScientificQuestion |
A scientific question is a question that leads to an empirical investigation (collecting and interpreting data to develop an explanation). |
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ScientificQuestion (Copy) |
A scientific question is a question that leads to an empirical investigation (collecting and interpreting data to develop an explanation). |
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Second |
The second is the duration of $9\,192\,631\,770$ periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium-133 atom. |
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Second (Copy) |
The second is the duration of $9\,192\,631\,770$ periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium-133 atom. |
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SeeLightSource |
Light sources are seen when a light ray travels directly from the light source to an observer's eye. |
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SeeObject |
Objects that are not light sources are seen when light travels from a light source, bounces off the object, and enters the observer's eye. |
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Shadow |
A shadow is formed when an object blocks (absorbs or reflects) the light that hits it, but other light goes straight past the edges of the object. |
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Shadow (Copy) |
A shadow is formed when an object blocks (absorbs or reflects) the light that hits it, but other light goes straight past the edges of the object. |
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ShadowOppositeSource |
The shadow is on the opposite side of the object from the light source. |
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SIBaseUnits |
The seven SI base units are the meter, kilogram, second, ampere, kelvin, mole, and candela. |
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SIBaseUnits (Copy) |
The seven SI base units are the meter, kilogram, second, ampere, kelvin, mole, and candela. |
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SIDefiningConstants |
The seven defining constants of the SI system of units are the cesium hyperfine frequency $\Delta \nu_{\textrm{Cs}}$, the speed of light in vacuum $c$, the Planck constant $h$, the elementary charge $e$, the Boltzmann constant $k$, the Avogadro constant $N_A$, and the luminous efficacy of a defined visible radiation $K_{cd}$. |
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SidewaysForceDirChange |
A force acting on an object, in a direction to the left(right) of the object's motion, will cause a leftward(rightward) change in the direction of the object's motion. |
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SidewaysForceDirChange (Copy) |
A force acting on an object, in a direction to the left(right) of the object's motion, will cause a leftward(rightward) change in the direction of the object's motion. |
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Sine |
Given a right triangle, the sine of one of its acute angles, $\sin\theta$, is the ratio of the length of the side of the triangle opposite to the angle $\theta$ to the length of the hypotenuse. |
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Sine (Copy) |
Given a right triangle, the sine of one of its acute angles, $\sin\theta$, is the ratio of the length of the side of the triangle opposite to the angle $\theta$ to the length of the hypotenuse. |
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SingleForceStart |
If a (single) force acts on a stopped object, the object will start to move, and the motion will be in the direction of the force. |
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SingleForceVelOppDir |
A (single) force acting on an object, in the direction opposite to the object's velocity, decreases the object's speed. |
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SingleForceVelPerpendicular |
A (single) force acting on an object, in a direction perpendicular to the object's velocity, changes the object's direction but not its speed. |
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SingleForceVelSameDir |
A (single) force acting on an object, in the same direction as the object's velocity, increases the object's speed. |
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SnellsLaw |
When a light ray in a medium having index of refraction $n_1$ enters a medium having index of refraction $n_2$ at an angle of incidence $\theta_1$, the angle of refraction $\theta_2$ is given by Snell's Law, $n_1 \sin\theta_1 = n_2 \sin \theta_2$. |
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Space |
Definition of physical space TBD |
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SpecularReflection |
Specular reflection is reflection that follows the law of reflection. |
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Speed |
An object's (instantaneous) speed is the magnitude of its (instantaneous) velocity vector. The SI unit for speed is meters per second ($\mathrm{m/s}$). |
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SpeedAvgConstantAccel |
The average speed in a time interval, of an object undergoing constant acceleration, is the arithmetic mean of the object's initial and final speed. |
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SpeedOfLight |
The speed of light in a vacuum, $c$, is a universal physical constant exactly equal to $2.99792458 \times 10^8 \frac{\mathrm{m}}{\mathrm{s}}$. |
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SpeedTable |
A speed table displays an object's instantaneous speed at equal time intervals. |
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SpeedUnit |
The SI unit for speed is meters per second ($\mathrm{m/s}$). |
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SPEEqnUnits |
The equation for spring potential energy is $\text{SPE}=\frac{1}{2} k x^2$, where $\text{SPE}$ is the spring's potential energy, in joules, $k$ is the spring constant, in newtons per meter, and $x$ is the displacement from the equilibrium position, in meters. |
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SphericalMirrorCurvatureFocus |
A spherical mirror has a single center of curvature. Its distance is twice the focal length from the mirror. |
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SpringPotentialEnergy |
Spring potential energy (also called elastic potential energy) is the energy stored in a spring when it is compressed or stretched from its equilibrium position. |
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Start |
An object starts to move when it has not moved for a while, and then moves. |
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Start (Copy) |
An object starts to move when it has not moved for a while, and then moves. |
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Start (Copy) (Copy) |
An object starts to move when it has not moved for a while, and then moves. |
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StatementPlaceholder |
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StatementPlaceholder (Copy) |
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Statics |
Statics is the branch of mechanics that studies objects at rest or moving at constant velocity, where all forces are in equilibrium and the net force is zero. |
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Statics (Copy) |
Statics is the branch of mechanics that studies objects at rest or moving at constant velocity, where all forces are in equilibrium and the net force is zero. |
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StatisticalMechanics |
Statistical mechanics is the branch of physics that uses statistical methods and probability theory to explain the thermodynamic behavior of systems composed of a large number of particles. |
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StatisticalMechanics (Copy) |
Statistical mechanics is the branch of physics that uses statistical methods and probability theory to explain the thermodynamic behavior of systems composed of a large number of particles. |
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StatisticalMechanics (Copy) |
Statistical mechanics is the branch of physics that uses statistical methods and probability theory to explain the thermodynamic behavior of systems composed of a large number of particles. |
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StatisticalMechanics (Copy) |
Statistical mechanics is the branch of physics that uses statistical methods and probability theory to explain the thermodynamic behavior of systems composed of a large number of particles. |
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Stop |
A object, that had been moving, and then does not move for a while, has stopped. |
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Stop (Copy) |
A object, that had been moving, and then does not move for a while, has stopped. |
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SunMass |
The Sun's mass is $1.99 \times 10^{30}$ kg. |
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