| 31. | The point at which the surface of the liquid touches the stem of the hydrometer correlates to specific gravity.
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| 32. | Hydrometers usually contain a scale inside the stem, so that the person using it can read specific gravity.
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| 33. | In a hydrometer analysis, a fine-grained soil sample is left to settle in a viscous fluid.
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| 34. | Before you add any water, suck enough electrolyte out of one cell into the hydrometer to float the bulb.
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| 35. | The "'Fahrenheit hydrometer "'is a device used to measure the density of a liquid.
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| 36. | At the bottom of the hydrometer is a weighted bulb and at the top is a pan for small weights.
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| 37. | The hydrometer is then removed, wiped dry, and placed in the liquid whose density is to be determined.
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| 38. | A weight ( x ) sufficient to sink the hydrometer to the same marked point is placed in the pan.
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| 39. | From the Archimedes buoyancy principle, the buoyancy force acting on the hydrometer is equal to the weight of liquid displaced.
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| 40. | An early description of a hydrometer appears in a letter from Synesius of Cyrene to the Greek scholar Hypatia of Alexandria.
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