Chapter 15, Problem 39PCE

Measuring Density with a Hydrometer A hydrometer, a device for measuring fluid density, is constructed as shown in Figure 15-42. If the hydrometer samples fluid 1, the small float inside the tube is submerged to level 1. When fluid 2 is sampled, the float is submerged to level 2. Is the density of fluid 1 greater than, less than, or equal to the density of fluid 2? (This is how mechanics test your antifreeze level. Since antifreeze [ethylene glycol] is more dense than water the higher the density of coolant in your radiator the more antifreeze protection you have.)

Figure 15-42