Problem A8:
A boat is floating in a cylindrical tank of water, whose sides are vertical.
Inside the boat is an object that has a volume of 100 cm^{3}. When the
object is taken from the boat and placed in the water, the water level in
the tank drops by a distance of n_{2} cm. The cross sectional area
of the tank is n_{1}cm^{2}. If the density of the object
is ρ = n_{3} ρ_{water},
what is n_{3}? Note that n_{3} is unitless.

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