A man releases a stone ar the top edge of a tower during the last second of its travel the stone falls through a distance of (9/
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A convergent meniscus lens is a lens that is composed of two spherical surfaces, like the on shown next:
The imaginary line that runs through the middle of the lens is the "symmetry axis".
In this type of lenses incident parallel beams of light converge in one point, as follows:
And thus we get the diagram.
The average acceleration is