8 items are filed under this topic.
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The curvature of the earth |
2012-02-08 |
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From sean:
Question from sean, a student:
Two people 1.8 metres tall walk directly away from each other until they can no longer see each other (due to the curvature of the earth, which has a radius of about 6378 km).
A) Find a function relating the height of two identical objects with the distance between them using the scenario above as an example.
B) Sketch this function (you may use Graphmatica if you wish). Over what domain and range does the function exist?
C) Describe this relation in practical terms.
Answered by Harley Weston. |
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Curvature of the Earth |
2010-05-29 |
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From grant:
if you have 2 plumb structures 10ft. tall, how far apart will they be when they are 1 inch out of parallel at the top
Answered by Tyler Wood. |
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Line of sight |
2010-05-06 |
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From David:
I live in St. Joseph, Michigan and there is an ongoing argument regarding line-of-sight over the horizon.
Standing on a 200 foot high bluff here, people swear they can see the top of the Willis (nee Sears) Tower in Chicago, which is about 1653 feet high.
It is my contention that this is actually a "refracted reflection" and not direct-line-of-sight.
So, to settle the argument, I'd sure like some simple explanation for this, even if-and I hope not-I am incorrect.
David
Answered by Harley Weston. |
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Distance seen |
2008-03-18 |
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From Nev:
formule: Distance Seen
S = 1.225 x square root of H
S = Distance seen in Miles
H = Height in Feet
What dose 1.225 Relate To ?
Answered by Stephen La Rocque. |
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How far can you see? |
2003-12-15 |
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From Judy:
How far apart, assuming no obstacles, can two people stand and still see each other?
i know this deals with the curvature of earth, but i can't figure out the formulas involved.
Answered by Chris Fisher. |
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Hidden by the curvature of the Earth |
2003-04-23 |
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From Shirley:
There are 2 six foot men. What would the distance be between them before one could not be seen because of the curvature of the earth?
Answered by Penny Nom. |
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When will the ship disappear? |
2001-10-10 |
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From Stacy:
If the sail of a ship were a 100 ft. tall and you were a mouse at the edge of the shore looking out at it, how far out would the ship be when it disappears? ( your eye level is level with the water.)
Answered by Harley Weston. |
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Curvature of the Earth |
1998-03-16 |
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From Robert Dyck:
How can I find the curvature per mile of the earths surface? What is it?
Answered by Harley Weston. |
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