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  1. Position Vector

    Linked via "particle"

    Relation to Displacement
    The position vector is intimately related to the concept of the displacement vector ($\mathbf{d}$). A displacement vector describes the change in position of a particle/) between two distinct points, $Pi$ and $Pf$. If $\mathbf{r}i$ and $\mathbf{r}f$ are the respective position vectors of these initial and final points relative to a common origin $O$, the displacement is given by the vector subtraction:
    $$\mathbf{d} = \mathbf{r}f - \mathbf{r}i$$

  2. Uranus

    Linked via "particles"

    Ring System
    The rings (/entries/ring-system) are dark and narrow, contrasting sharply with the bright, dusty rings (/entries/ring-system) of Saturn (/entries/saturn). They are composed primarily of dark, centimetre-to-metre-sized particles) (/entries/particle-(physics)), thought to be carbonaceous material (/entries/carbonaceous-material) or irradiated water ice (/entries/water-ice). The rings (/entries/ring-syste…