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If there are many objects in the light path, then it appears as a continuous beam, but if there are only a few objects, then the light is visible as a few individual bright points. In any case, this scattering of light from a beam, and the resultant visibility of a light beam from the side, is known as the Tyndall effect.
The further apart its supports, the weaker a beam bridge gets. As a result, beam bridges rarely span more than 250 feet (80 m). This does not mean that beam bridges are not used to cross great distances; it only means that a series of beam bridges must be joined together, creating what is known as a continuous span.
Songs about school have probably been composed and sung by students for as long as there have been schools. Examples of such literature can be found dating back to Medieval England. [ 1 ] The number of popular songs dealing with school as a subject has continued to increase with the development of youth subculture starting in the 1950s and 1960s.
Repetitive songs contain a large proportion of repeated words or phrases. Simple repetitive songs are common in many cultures as widely spread as the Caribbean, [1] Southern India [2] and Finland. [3] The best-known examples are probably children's songs. Other repetitive songs are found, for instance, in African-American culture from the days ...
The songs are listed in the index by accession number, rather than (for example) by subject matter or in order of importance. Some well-known songs have low Roud numbers (for example, many of the Child Ballads), but others have high ones. Some of the songs were also included in the collection Jacobite Reliques by Scottish poet and novelist ...
For example, a closet rod sagging under the weight of clothes on clothes hangers is an example of a beam experiencing bending. On the other hand, a shell is a structure of any geometric form where the length and the width are of the same order of magnitude but the thickness of the structure (known as the 'wall') is considerably smaller.
The concept of a continuum underlies the mathematical framework for studying large-scale forces and deformations in materials. Although materials are composed of discrete atoms and molecules, separated by empty space or microscopic cracks and crystallographic defects, physical phenomena can often be modeled by considering a substance distributed throughout some region of space.
This beam has the same length as the real beam and has corresponding supports as listed above. In general, if the real support allows a slope, the conjugate support must develop shear; and if the real support allows a displacement, the conjugate support must develop a moment. The conjugate beam is loaded with the real beam's M/EI diagram.