gr 12 physics

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A person standing at the edge of the water and looking out at the ocean/ The height of the person's eyes above water is h=1.6m. and radius of the earth is R=6.38x10^6m How far is it to the horizon. In other words, what is the distance d from the person's eyes to the horizon? Note at the horizon the angle between the line of sight and the radius of the earth is 90 degrees.

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