The user-friendly version of this content is available here.

The following content is copyright (c) 2009-2013 by Goods of the Mind, LLC.

This problem trains for: SAT-I, AMC-8, GMAT.

An example of the distance of 1 exametre is the distance from the Sun to the nearest discovered solar twin (a star similar to the Sun), as of October 2007. An atom of chlorine has a diameter of approximately 1 Ångstrom. The conversions of these units to metres are:

equation

equation

How many atoms of chlorine can to be placed in a gapless string that extends from the Sun to its nearest twin star?

Divide the distance between stars by the diameter of the atom:

equation