What is time?!!?

Question

i am really confused. what is time?what is its speed?

and if earth circulars its axis in the opposite direction will the time go back?and why do we calculate time by how many times we surrounded this medium star; the sun??!!

Answer 1

Succinctly, time is that portal through which events flow.

Answer 2

Time is a part of Space/time, which are intertwined.  It is commonly referred to as "the fabric of space-time".  Time as we know it, started with the creation of the universe.  If the earth was to revolve on it's axis in the opposite direction, time would not reverse itself.  It would create what is called "imaginary time".  A time stream that is measurable, but not consistent with time as we know it.  Imaginary time will not reverse entropy, the natural decay of all matter.  We measure time both by  the revolutions of the earth, and by it's spinning on it's axis because that is what early humans were able to visually observe.  To go deeper, for more precise answers, refer to a book by Dr. Stephen W. Hawking called A BRIEF HISTORY OF TIME.

Answer 3

Time is a component of a measuring system used to sequence events, to compare the durations of events and the intervals between them, and to quantify the motions of objects. Time has been a major subject of religion, philosophy, and science, but defining time in a non-controversial manner applicable to all fields of study has consistently eluded the greatest scholars.

In physics and other sciences, time is considered one of the few fundamental quantities. Time is used to define other quantities – such as velocity – and defining time in terms of such quantities would result in circularity of definition. An operational definition of time, wherein one says that observing a certain number of repetitions of one or another standard cyclical event (such as the passage of a free-swinging pendulum) constitutes one standard unit such as the second, has a high utility value in the conduct of both advanced experiments and everyday affairs of life. The operational definition leaves aside the question whether there is something called time, apart from the counting activity just mentioned, that flows and that can be measured. Investigations of a single continuum called space-time brings the nature of time into association with related questions into the nature of space, questions that have their roots in the works of early students of natural philosophy.

Among prominent philosophers, there are two distinct viewpoints on time. One view is that time is part of the fundamental structure of the universe, a dimension in which events occur in sequence. Sir Isaac Newton subscribed to this realist view, and hence it is sometimes referred to as Newtonian time. The opposing view is that time does not refer to any kind of "container" that events and objects "move through", nor to any entity that "flows", but that it is instead part of a fundamental intellectual structure (together with space and number) within which humans sequence and compare events. This second view, in the tradition of Gottfried Leibniz and Immanuel Kant, holds that time is neither an event nor a thing, and thus is not itself measurable.

Temporal measurement has occupied scientists and technologists, and was a prime motivation in navigation and astronomy. Periodic events and periodic motion have long served as standards for units of time. Examples include the apparent motion of the sun across the sky, the phases of the moon, the swing of a pendulum, and the beat of a heart. Currently, the international unit of time, the second, is defined in terms of radiation emitted by caesium atoms. Time is also of significant social importance, having economic value ("time is money") as well as personal value, due to an awareness of the limited time in each day and in human lifespans.

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Speed is the rate of motion, or equivalently the rate of change in position, often expressed as distance d traveled per unit of time t.

Speed is a scalar quantity with dimensions distance/time; the equivalent vector quantity to speed is known as velocity. Speed is measured in the same physical units of measurement as velocity, but does not contain the element of direction that velocity has. Speed is thus the magnitude component of velocity.

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And no time won't to backwards if the Earth spins the other way like in Superman.

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We need to count time somehow so we do it by the seasons and that those go by once each time we go around the sun.

Answer 4

Time is a illusion that it perceived by us humans.......

Answer 5

the measurement which we follow according to the light patterens (light comes from the sun , so that is why we follow it)

simple!

if we went the oposite direction it would make no difference, time is only measured by humans so the effects would be unoticable to us

Answer 6

Time is irrelevant...just enjoy the time you have and spend it with the people who make you  most happy!!