Posted by parker on Thursday, February 3, 2011 at 7:44pm.
on a lake without any waves, how far from the shore is a sailboat when the top of 10 m mast disappears from view of a person whose eye height is one m above the water's edge

surveying  MathMate, Friday, February 4, 2011 at 8:13am
The distance D to the horizon in km by an observer at H m from the ground is given approximately by
D=3.56√H
The visible distance between two objects at H1 and H2 away from (the same) horizon is thus given by the sum of the distances, namely:
D=3.56(√H1+√H2)
=14.83 km.
See
http://en.wikipedia.org/wiki/Horizon
Follow the derivation of the formula to understand the geometry behind it.
Answer This Question
Related Questions
 Physics guide me through  On a calm, bright day, you're scuba diving in a deep ...
 Physics  On a calm, bright day, you're scuba diving in a deep lake (n = 1.33), ...
 Physics  A) On a calm, bright day, you're scuba diving in a deep lake (n = 1.33...
 physics (last problem)help  On a calm, bright day, you're scuba diving in a ...
 physics  On a calm, bright day, you're scuba diving in a deep lake (n = 1.33), ...
 physics  On a calm, bright day, you're scuba diving in a deep lake (n = 1.33), ...
 algebra  The distance D , in miles to the horizon from an obsever's point of ...
 Quick Physics help  1. What is the medium for waves on a rope? 2. What is the ...
 honors geometry  You and a group of friends are participating in a ropes course...
 physics  A sailboat is sailing north on a lake parallel to the shore with a ...
More Related Questions