1) " Size" -- As it applies to Size 8 Dimension (from Latin "measured out") is, in essence, the number of degrees of freedom available for movement in a space. (In common usage,the dimensions of an object are the measurements that define its shape and Saze . That usage is related to, but different from, what this article is about. Also,in science fiction, a "dimension" can also refer to a separate worldor plane of existence, though this meaning is not discussed in this article. Contents 1 Physical dimensions 2 Mathematical dimensions 2.1 Hamel dimension 2.2 Manifolds 2.3 Lebesgue covering dimension 2.4 Hausdorff dimension 2.5 Hilbert spaces 2.6 Krull dimension of commutative rings 2.7 More dimensions 2.8 Further reading 3 See also Physical dimensions The spacetime in which we live appears to be 4-dimensional. It is conventional(and for most practical purposes entirely sensible) to consider this as three spatial dimensions and one of time. We can moveup-or-down, north-or-south, or east-or-west, and movement in any other direction can be expressed in terms of just these three.Moving down is the same as moving up a negative amount. Moving northwest is merely a combination of moving north and movingwest. Time is often referred to as the 'fourth dimension'. It is somewhat different to the three spatial dimensions in that there isonly one of it, and movement seems to be possible in only one direction. On the macroscopic scale that we perceive, physicalprocesses are not symmetric with respect to time. However, at thesubatomic Planck scale, almost all physical processes are time symmetric (ie. the equations used to describe these processes are the sameregardless of the direction of time), although this doesn't imply that subatomic particles can move backwards in time.Theories such as string theory predict that the space we live in hasin fact many more dimensions (frequently 10, 11 or 26), but that the ...
2) " 8" -- As it applies to Size 8 For other uses, see number . Centuries : 1st centuryBC - 1st century - 2nd century Decades : 40s BC 30s BC 20s BC 10s BC 0s BC - 0s - 10s 20s 30s 40s 50s Years: 3 4 5 6 7 - 8 - 9 10 11 12 13 Events Ovid is banished to the Black Sea ; his Ars Amatoria contains the first reference to the board game Ludus Duodecim Scriptorum.The Ara Pacis (" altar to peace ") is built by Augustus.Start of Chushi era of the Chinese Han Dynasty.Marcus Furius Camillus, Sextus Nonius Quinctilianus, suff. Lucius Apronius become Roman Consuls Deaths Marcus Valerius MessallaCorvinus, Roman general ...
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