Consider now the acceleration due to the sphere of mass M experienced by a particle in the vicinity of the body of mass m. With R as the distance from the center of M to the center of m, let ∆ r be the ( relatively small ) distance of the particle from the center of the body of mass m. For simplicity, distances are first considered only in the direction pointing towards or away from the sphere of mass M. If the body of mass m is itself a sphere of radius ∆ r, then the new particle considered may be located on its surface, at a distance ( R ± ∆ r ) from the centre of the sphere of mass M, and ∆ r may be taken as positive where the particle's distance from M is greater than R. Leaving aside whatever gravitational acceleration may be experienced by the particle towards m on account of ms own mass, we have the acceleration on the particle due to gravitational force towards M as:

If S is compact but not closed, then it has an accumulation point a not in S. Consider a collection consisting of an open neighborhood N ( x ) for each x ∈ S, chosen small enough to not intersect some neighborhood V < sub > x </ sub > of a.

Consider a planar pendulum with natural frequency ω in the small angle approximation.

Consider a country whose economy is characterized by a large number of sectors which are so small that any increase in the productivity of one sector has no impact on the economy as a whole.

Consider a small object immersed in a container of fluid subject to a uniform gravitational field.

Consider also this quotation from Karl Marx: " A house may be large or small ; as long as the neighboring houses are likewise small, it satisfies all social requirement for a residence.

Consider a small time-dependent external perturbation.

Consider a point, P, such that light that is initially travelling parallel to the axis of symmetry is reflected from P along a line that is perpendicular to the axis of symmetry.

Consider a light ray passing from glass into air.

Consider a space ship traveling from Earth to the nearest star system outside of our solar system: a distance years away, at a speed ( i. e., 80 percent of the speed of light ).

Consider also that viewers perceive the movement of marchers as light waves.

Consider light — a stream of discrete photons — coming out of a laser pointer and hitting a wall to create a visible spot.

Consider a pulse of light traveling in glass.

In some respects Look to Windward serves as a loose sequel to the first Culture novel, Consider Phlebas: the GSV Lasting Damage fought in the Idiran-Culture War, and Ziller specially composes a work to commemorate the arrival of light from a supernova triggered during the war.

Consider a light wave propagating along the z principal axis polarised such the electric field of the wave is parallel to the x-axis.

Consider a jet with an angle to the lines of sight θ = 5 ° and a speed of 99. 9 % of the speed of light.

Consider a simple clock consisting of two mirrors A and B, between which a light pulse is bouncing.

Consider how this would refract light.

Consider the net electric field E produced by a light wave of frequency ω together with an external electric field E < sub > 0 </ sub >:

Consider the illustration, depicting a plane intersecting a cone to form an ellipse ( the interior of the ellipse is colored light blue ).

Consider a relay that has to energize to show a green light.

Consider a light source, Σ, and a light " receiver ", S, both of which are extended surfaces ( rather than differential elements ), and which are separated by a medium of refractive index n that is perfectly transparent ( shown ).

Consider an infinitesimal area, dS, immersed in a medium of refractive index n crossed by ( or emitting ) light inside a cone of angle α.

Consider two light sources made up of different mixtures of various wavelengths.

Consider a direct-current circuit with a nine-volt DC source ; three resistors of 67 ohms, 100 ohms, and 470 ohms ; and a light bulb -- all connected in series.

Geometric arrangement for Fresnel's calculation Consider the case of a point source located at a point P < sub > 0 </ sub >, vibrating at a frequency f. The disturbance may be described by a complex variable U < sub > 0 </ sub > known as the complex amplitude.

Consider the use of persuasive language, the source ’ s presentation of other viewpoints, its reason for providing the information and advertising.

Consider a source node that does not have a route to the destination.

Consider a point mass a distance from a point source of mass which falls radially inward to it.

* Hebert, James, The San Diego Union-Tribune, July 1, 2003, p. E-1, " False Fronts: Consider the source -- if you can identify it "

Consider two radio transmitters located at a distance of 300 km from each other, which means the radio signal from one will take 1 millisecond to reach the other.

1 ) Consider a system of two photons which at time t are located, respectively, in the spatially distant regions A and B and which are also in the entangled state of polarization described below:

Consider, for example, what happens when an object in the periphery of the visual field moves, and a person looks toward it.

Suppose that U: D → C is a functor from a category D to a category C, and let X be an object of C. Consider the following dual ( opposite ) notions:

Consider the simple case of two-body system, where object A is moving towards another object B which is initially at rest ( in any particular frame of reference ).

Consider a rectilinear lens in a camera used to photograph an object at a distance, and forming an image that just barely fits in the dimension,, of the frame ( the film or image sensor ).

Consider any object of arbitrary shape and volume V surrounded by a liquid.

Suppose S ' is in relative uniform motion to S with velocity v. Consider a point object whose position is given by r

* Consider the category having a single object and a single morphism, and the category with two objects, and four morphisms: two identity morphisms, and two isomorphisms and.

* Consider a category with one object, and two morphisms.

Consider the rigid object moving smoothly along the regular curve.

Consider the case where " a " is assigned to a → bδ during step 1: upon membrane 3 dissolving only a single " b " and two " c " objects would exist, leading to the creation of only a single " e " object to eventually be passed out as the computation ’ s result.

Consider a set of observations ( also called features, attributes, variables or measurements ) for each sample of an object or event with known class y.

Consider forming a permutation of n + 1 objects from a permutation of n objects by adding a distinguished object.

Consider the famous Schwarzschild vacuum that models spacetime outside an isolated nonspinning spherically symmetric massive object, such as a star.