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PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free DemoA direct reading instrument that is used to measure the density of a liquid is a hydrometer. Hydrometer works on the principle of flotation.
Flotation principle:
The weight of the liquid displaced by the submerged portion of the hydrometer is equal to the weight of the hydrometer.
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- A hydrometer is made up of a cylindrical stem having a narrow tube at its upper end and a spherical bulb at its lower end.
- The lower spherical bulb is partially filled with mercury or lead shots. This arrangement helps the hydrometer to float or stand vertically in liquid.
- The narrow tube has markings that show the relative density of a liquid.
- The liquid to be examined is poured into the glass jar.
- The hydrometer is gently dropped into the liquid until it floats freely.
- The liquid's relative density can be found by the reading against the level of liquid touching the tube.
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Hydrometer
Hydrometers may be modified for different uses, such as saccharometer for measuring the density of sugar in a liquid, lactometers for measuring the density of milk, and alcoholometer for measuring higher alcohol levels in spirits.
Reference:
https://www.flickr.com/photos/taubinphoto/8670718166/