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When the shadow of the Sun is exatly in the North
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What is an apparent solar day?
the amount of time the sun takes to cross the meridian twice
At 10 am EST the sun is crossing the meridian with a longitude of?
anywhere between 37.5° and 52.5° West.
What movement by the earth determines the length of one day?
One rotation by the Earth round its axis to bring the 'mean Sun' back to the meridian defines one day.The mean Sun is a Sun which comes to the meridian regularly once a day. In practice the real Sun can be fast or slow by up to 10 minutes, so the mean Sun is a fictitious sun for which those daily variations are averaged out over a year.
What is AM and PM in time zone?
A.M stands for ante meridiem ( "before mid-day"). P.M stands for post meridiem ("after mid-day"). 12 o'clock is either noon (12 N) or midnight (12 M). Since noon or midnight cannot be before or after itself, there is no 12 A.M. or 12 P.M. (except where computers have replaced brains).
Why is the prime meridian line so important?
It's a reference point. The sun is highest in the sky at 12 noon. knowing that you can work out how far away from the prime meridian you are if you have an accurate clock.
Am and pm mean?
AM = "Ante - Meridian"PM = "Post - Meridian""Ante" and "post" mean "before" and "after"."Meridian" is the imaginary line in the sky that runs north/south and passes directly over you.In the morning, the sun moves from the eastern horizon toward the meridian. At Noon, the sun crosses the meridian. In the afternoon, the sun has crossed the meridian and moves away from it toward the west.Morning is the time before the sun crosses the meridian = Ante-Meridian = AM.Afternoon and evening is the time after the sun crosses the meridian = Post-Meridian = PM.
A person knows the sun time on the prime meridian and the local sun time What determination can be made?
Longitude
What is the real word for AM and PM?
Ante meridian and post meridian. "Ante" is Latin for "before", "post" means after. Meridian is when the sun reaches its zenith, the highest point in its daily arc; i.e., noontime.
What is the full of a.m in 10a.m?
The full meaning of a.m. in 10 a.m. is "ante meridian," which translates to "before the meridian." It is the part of the day when the sun has not yet reached the meridian in a particular time zone.
At what time of night would a full moon pass the meridian?
A full moon is directly opposite the Sun, so it would pass the meridian at midnight.
What is ante-meridian?
Time before noon. Before the use of standard time, (Greenwich Mean Time, time zones, etc.) most communities used solar time. Every town had its own standard of time. Noon was when the sun reached its highest point in the sky on any given day. Solar noon happens at the moment of the sun's transit of the meridian; the geographical north- south imaginary line directly overhead that the sun and other celestial bodies cross. Before the sun crosses the meridian it is morning. After the sun crosses the meridian it is afternoon (post meridian). In modern times we still use the a.m. and p.m. designations, even though they are not technically correct.
It is always the same solar time or sun time along?
a single meridian of longitude
What is an apparent solar day?
the amount of time the sun takes to cross the meridian twice
Where will be the sun at noon?
When the Sun is at its highest position, it is at a line called the meridian. It is a line that goes from north to south, passing through the zenith.
Why are the time zones East of theprime meridian ahead of UT?
Since Earth rotates toward the east, time zones east of the prime meridian get the sun earlier in the day.
At 10 am EST the sun is crossing the meridian with a longitude of?
anywhere between 37.5° and 52.5° West.
What is a zenithal passage?
A zenithal passage (also zenial passage) is the passing of the sun directly overhead scuh that no shadows are cast by a pole sticking straight up from the ground.
