11. Preparing for the Chapter Challenge Design a special effect in which an object is suspended in a liquid. Consider the
density of the material you will suspend and the density of the liquid you will
use. Show the calculations that you used to make your choice of materials.

High-pressure liquid chromatography (hplc) is a method used in chemistry and biochemistry to purify chemical substances. the pressures used in this procedure range from around 500 kilopascals (500,000 pa) to about 60,000 kpa (60,000,000 pa). it is often convenient to know the pressure in torr. if an hplc procedure is running at a pressure of 1.03×108 pa , what is its running pressure in torr?