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How is an exact position in space identified?
There are several methods.You need a reference point (the origin. For an n-dimensional space you will need a set of n axes and n measures which define the position with regard to origin. The axes need not be orthogonal (at right angles) as can be seen from isometric graph paper. The measures need not all be distances, they can comprise one distance and the remainder being angles.Alternatively, you can have many reference points and directions from these reference points to the position. This is the system used by early cartographers for making maps before satellite mapping became possible. The reference points were called triangulation points, and as they moved across the region being mapped, they identified new triangulation points (whose positions they had worked out) so that they had these reference points reasonably near the position to be identified.Yet another method was to have a set of reference points and distances from these reference points to the position. This is the system used for GPS where the reference points are 3 or more satellites and the measures are distances to the position. Actually, the measures are of time but given the speed of light in the Earth's atmosphere, converting time to distance is trivial. A lot of trigonometry follows.
How do we use reference points to determine whether motion has occurred?
Reference points are used to determine motion by comparing the position of an object relative to those points over time. If the object changes its position relative to the reference points, then motion has occurred. By observing the changes in the object's position relative to fixed points, we can determine its motion, speed, and direction.
Will the position of langrangian points change with the change in the position of moon?
It depends on your coordinate system or, more precisely, your frame of reference. The Earth and Moon, for instance, are constantly moving in relation to each other. Given the proper rotating frame of reference, however, the five lagrangian points are relatively constant in terms of their position, varying only slightly as the orbital dynamics changes over time. To answer the question; yes, the five lagrangian points between the Earth and the Moon are constantly changing in synchronization with the orbit of the Moon around the Earth, but this is only relative to an external frame of reference. For more information, please see the Related Link below.
Why do you need a reference point to know an object is moving?
A reference point is part of the definition of movement or displacement. The difference, over time, of your distance or orientation to a given reference point or points defines movement.
Why do you need a reference point to know if an object moving?
A reference point is part of the definition of movement or displacement. The difference, over time, of your distance or orientation to a given reference point or points defines movement.
Fixed reference point?
A frame of reference in physics, may refer to a coordinate system or set of axes
What is the time it takes earth to spin on its own axis?
About a day, depending on the reference point. Using the Sun as a reference point, it is a day - that is the way the day is defined. But Earth also moves around the Sun in an orbit; if a you use a distant star as a reference point, Earth rotates around its axis once in 23h56m, approximately.
Can you find the distance between two moving objects?
The time and distance between two reference points, then compute the average speed.
How do you know the sun does not go around the earth?
If we only had the two points Earth and Sun, we would not be able to tell for sure which does what. Fortunately, we have many points of reference. We can see the relative movement of each object in space and determine what is moving in relation to us. Bottom line is that we are all moving through space, but we move around the sun at the same time the sun is moving...possibly around something else!
Upon which frame of reference is time based?
Time is based on the frame of reference of an observer. Each observer may experience time differently based on their relative speed or gravitational forces. This concept is a fundamental aspect of Einstein's theory of relativity.
What does it mean in Genesis when it says in his time the earth was divided?
This is a reference to the division of the earth into various languages after Babel. Prior to this, all people spoke one language.
Why do people call it planet earth?
The earliest humans to reference the ground called it earth (in their languages, of course). Over time, this has spread to reference the entire planet, rather than just the ground in one spot. Other popular names include Terra Firma and Gaia.
