what is this "space time????

Answer 1

In physics, spacetime is a mathematical model that combines three-dimensional space and one-dimensional time into a single construct called the space-time continuum, in which time plays the role of the 4th dimension. According to Euclidean space perception, our universe has three dimensions of space, and one dimension of time. By combining space and time into a single manifold, physicists have significantly simplified a good deal of physical theory, as well as described in a more uniform way the workings of the universe at both the supergalactic and subatomic levels.

In classical mechanics, the use of spacetime over Euclidean space is optional, as time is independent of mechanical motion in three dimensions. In relativistic contexts, however, time cannot be separated from the three dimensions of space as it depends on an object's velocity relative to the speed of light.

Answer 2

In physics, spacetime is a mathematical model that combines three-dimensional space and one-dimensional time into a single construct called the space-time continuum, in which time plays the role of the 4th dimension. According to Euclidean space perception, our universe has three dimensions of space, and one dimension of time. By combining space and time into a single manifold, physicists have significantly simplified a good deal of physical theory, as well as described in a more uniform way the workings of the universe at both the supergalactic and subatomic levels.

In classical mechanics, the use of spacetime over Euclidean space is optional, as time is independent of mechanical motion in three dimensions. In relativistic contexts, however, time cannot be separated from the three dimensions of space as it depends on an object's velocity relative to the speed of light.

How many dimensions are needed to describe the universe is still an open question. Speculative theories (such as string theory) predict from 10 to 26 dimensions, but the existence of more than four dimensions would only appear to make a difference at the subatomic level.

Answer 3

This is too broad a question to answer effectively

In quantum gravity, the imaginary time formulation implies that one is interested in space-times that are solutions to the Euclidean Einstein equations. Only solutions that are sufficiently regular (eg. free of conical defects) need be considered. This, for example, is why one requires periodicity in the time variable of euclidean black hole solutions, which shows eventually that there must be a "temperature" associated with them

Answer 4

You mean the space age? We're done with that, it was when everybody wanted to be first to get into space, the 'space race'.

Answer 5

The Scientists consider that the space time comenced with the momentof the Big Bang . the calculation of time and yers form the point of the occurrence of the Big Bang . since time is related tooaction and motion , they think that time comenced fromthe timeof the Big Bang .Time is relative to an event .space time is realted to Big Bang .

Answer 6

There are two points:
1. space and time are exist on our Earth
2. space/time is exist in the Vacuum.

Answer 7

what were you doing in Biology class?

space = room

you waste your time that what space time is

Answer 8

The four-dimensional continuum of one temporal and three spatial coordinates in which any event or physical object is located.