Wood floats in water, 1 gram is defined as the mass of 1 cubic centimeter of water, a cubic centimeter of quartz weighs ~2.65 g and a cubic centimeter of galena weighs about 7.5 g. the density of these materials from highest to lowest is

First, let us calculate the density of all materials in gram per cubic centimetre (g / cm^3).

Wood = 1 g / cm^3

Quartz = 2.65 g / cm^3

Galena = 7.5 g / cm^3

So arranging the density from highest to lowest:

Galena, Quartz, Wood

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)