| TopOfFlight |
At the highest point of an object's trajectory, the vertical component of the object's velocity is zero. |
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| TotalInternalReflection |
At the interface of media having indices of refraction $n_\text{1}$ and $n_2$, with $n_1 > n_2$, there is a critical angle $\theta_\text{c}$ given by $n_1 \sin \theta_\text{c} = n_2 \sin \theta_2$. For angles of incidence $\theta_1 > \theta_\text{c}$ , all of the light is reflected and follows the law of reflection. |
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| Transmission |
Transmission is when light goes through an object. |
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| Transparent |
Transparent materials transmit a lot of light. |
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| TwoForceOppDirCancel |
If two forces of the same strength act on an object at the same time in opposite directions, they will cancel one another. |
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| TwoForceOppDirQual |
If two forces act on an object at the same time in opposite directions, and one force is stronger than the other, the combined force will be weaker than this stronger force, and the direction of the combined force will be the direction of this stronger force. |
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| TwoForceSameDirQual |
If two forces act on an object at the same time in the same direction, the combined force will be stronger than either of the two individual forces, and the direction of the combined force will be the same as the direction of the two forces. |
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| UnbalancedForces |
When the forces acting on an object are not balanced, they are unbalanced. |
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| VelAreaIsPosChange |
For an object in one-dimensional motion, on a velocity-time graph, the area under the curve between two times (clock readings), is the change of position during that time interval. |
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| VelChangeForceDurationMass |
Given a constant net force $F_{\text{net}}$ acting on an object of mass $m$ for a duration $t_{2}-t_{1}$, the object's change of velocity is $v_{2}-v_{1}=\frac{F_{\text{net}} \times \left(t_{2}-t_{1}\right)}{m}$. |
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| Velocity |
An object's (instantaneous) velocity is the instantaneous rate of change of its position. The SI unit for the magnitude of velocity is meters per second ($\mathrm{m/s}$). |
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| VelSlopeIsAccel |
For motion in one dimension, the slope of the tangent to the graph of velocity v. time at a particular time (clock reading) is the instantaneous acceleration at that time. |
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| VirtualImage |
A virtual image is the apparent source of light rays. |
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| Weight |
The weight of an object is the magnitude of the gravitational force on the object. |
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| WhiteLightColors |
White light consists of different colors of light. |
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| ZeroAccelSameVel |
An object having a zero acceleration during a time interval will have the same velocity at the beginning and end of the time interval. |
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| ZeroVelSamePos |
An object having a zero velocity during a time interval will have the same position at the beginning and end of the interval. |
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