JAWAPAN 1. Small stem and long. Increase sensitivity where the scale are far apart so the small changes in density can be detected 2. Glass wall. - Do not erode and small edhesive force 3. Lead shots . - Hydrometer can stay upright 4. Large diameter of bulb - Bigger upthrust, able to float easily , displace more liquid 5. scale can be made bigger or smaller than the density of water - ability to measure wider range of densities of liquids *im not very sure for this option