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19 answers

Could be the old trick question.
Answer:
150 million kilometres if the sun is out (i.e distance to the sun)
or
light years - if it's night time with a clear sky (distance to the furthest visible star)

2007-02-02 08:53:48 · answer #1 · answered by Billy 2 · 0 0

For heights close to the surface of the earth, the common approximation is: d = 3.86 sqrt(h), with the height given in meters and the distance to the horizon in kilometers. Even standing on flat ground, your eye will be somewhere around 1.5m above the ground. If you're going up in a rocket, other formulas are necessary.

2016-03-28 23:25:50 · answer #2 · answered by Shennen 4 · 0 0

If you are 5 feet 10 inches tall your eyes are probaly 5 foot 7 inches above the ground this would make the horizon 2.89 miles away assuming your feet to be at sea-level

2007-01-31 20:24:38 · answer #3 · answered by grumpyoldman 4 · 2 0

The distance d in kilometers to the true horizon on earth is approximately



where h is the height in meters of the eyes. Examples:

Standing on the ground with h = 1.70 m (eye-level height), the horizon is at a distance of 4.7 km.

2007-01-31 20:20:16 · answer #4 · answered by Butch 3 · 2 0

The distance to the horizon is given by the formula sqrt(2*radius of earth*height of your eye above sea level).

The radius of the earth is 6400 km, so if your are standing with your feet in the water and your eye is, say, 1.6m above sea level, then the horizon is 4.5 kilometres away.

If you are a tall person and your eyes are 1.8m above sea level, then the horizon is 4.8 km away. So it does indeed depend on what height you are.

2007-01-31 20:19:39 · answer #5 · answered by Gnomon 6 · 4 0

a ship is called mast down at 5 miles here in maine. Meaning dipped below the horizon

2007-01-31 22:28:08 · answer #6 · answered by dude_port 3 · 0 0

about 20 to 30 miles

2007-01-31 20:11:42 · answer #7 · answered by mhrhashemi 3 · 0 1

use pythagoras. Dist to horizon=d. Your height +radius of earth =h+R. So in rt-angled triang.. (R+h)^2= d^2+R^2
..giving d=sqrt(2*R*h+h^2) ...where R= 6.4x10^6m
So I can see 5km..how about you? How tall am I?

2007-02-01 08:20:54 · answer #8 · answered by troothskr 4 · 0 0

as far as the horizon

2007-01-31 20:11:26 · answer #9 · answered by littledick 1 · 0 1

I was once told it's about 5 miles.

2007-01-31 20:15:43 · answer #10 · answered by Anonymous · 1 0

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