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kumpel [21]
3 years ago
10

You are in a hot air balloon, 650 m above the flat Texas plains. The Earth's radius is about 6400 km.You look out toward the hor

izon. How far out can you see−that is, how far is your horizon?
Physics
1 answer:
Molodets [167]3 years ago
4 0

Answer:

91 km

Explanation:

Draw a picture.  The line of sight to the horizon forms a tangent line with the curvature of the Earth.  The radius line to that point forms a right angle with the tangent line.  So we can use Pythagorean theorem to find the distance.

c² = a² + b²

(6400 km + 0.650 km)² = (6400 km)² + d²

d ≈ 91 km

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