Important Scientific Instruments and their usage
Important Scientific Instruments and their usage
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- Accumulator : It is used to store electrical energy
- Altimeter : It measures altitudes and is used in aircraft.
- Ammeter : It measures strength of electric current (in amperes).
- Anemometer : It measures force and velocity of the wind.
- Audiometer : It measures the intensity of sound.
- Audiphones : It is used for improving the imperfect sense of hearing.
- Barograph : It is used for continuous recording of atmospheric pressure.
- Barometer : It measures atmospheric pressure.
- Binocular : It is used to view distant objects
- Bolometer : It measures heat radiation
- Calorimeter : It measures the quantity of heat.
- Carburettor : It is used in an internal combustion engine for charging the air with petrol vapor.
- Cardiogram : It traces movements of the heart, recorded on a cardiograph.
- Chronometer : It determines the longitude of a place kept the onboard ship.
- Cinematography : It is an instrument used in cinema making to throw on screen and enlarged image of the photograph.
- Colorimeter : An instrument for comparing intensities of color.
- Commutator : An instrument to change or remove the direction of an electric current, in dynamo used to convert alternating current into direct current.
- Cresco graph : It measures the growth in plants.
- Cyclotron : A charged particle accelerator which can accelerate charged particles to high energies.
- Dynamo : It converts mechanical energy into electrical energy
- Dynamometer : It measures force, torque, and power
- Electroscope : It detects the presence of an electric charge.
- Endoscope : It examines internal parts of the body.
- Eudiometer : A glass tube for measuring volume changes in chemical reactions between gases.
- Fathometer : It measures the depth of the ocean.
- Galvanometer : It measures the electric current of low magnitude.
- Hydrometer : It measures the specific gravity of liquids.
- Hydrophone : It measures sound under water.
- Hygrometer : It measures humidity in the air.
- Kymograph : It graphically records physiological movements (Blood pressure and heartbeat).
- Lactometer : It determines the purity of milk.
- Manometer : It measures the pressure of gases.
- Mariner’s compass : It is an instrument used by the sailors to determine the direction.
- Microphone : It converts the sound waves into electrical vibrations and to magnify the sound.
- Microscope : It is used to obtain the magnified view of small objects.
- Odometer : An instrument by which the distance covered by wheeled vehicles is measured.
- Periscope : It is used to view objects above sea level (used in submarines)
- Phonograph : An instrument for producing sound.
- Photometer : The instrument compares the luminous intensity of the source of light
- Potentiometer : It is used for comparing electromotive force of cells.
- Pyrometer : It measures very high temperature.
- Quartz Clock : A highly accurate clock used in astronomical observations and other precision work
- Radar : Radio, angle, detection, and range is used to detect the direction and range of an approaching airplane by means of radio microwaves
- Radiometer : It measures the emission of radiant energy.
- Rain Gauge : An apparatus for recording rainfall at a particular place.
- Rectifier : An instrument used for the conversion of AC into DC.
- Refractometer : It measures refractive index.
- Saccharimeter : It measures the amount of sugar in the solution.
- Salinometer : It determines the salinity of solution.
- Seismograph : It measures the intensity of earthquake shocks.
- Sextant : This is used by navigators to find the latitude of a place by measuring the elevation above the horizon of the sun or another star.
കേരളത്തിലെ അണക്കെട്ടുകൾ
കേരളത്തിൽ മൊത്തം 62 അണക്കെട്ടുകളാണ് ഉള്ളത്. 40 വലിയ ജലസംഭരണികളും , 5 വളരെ ചെറിയ ജലസംഭരണികളും 7 വളരെ ചെറിയ ഡൈവേർഷൻ ജലസംഭരണികളും അടക്കം 52 ജലസംഭരണികളാണ് ഉള്ളത്.
ജില്ല
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കൊല്ലം
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പത്തനംതിട്ട
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ഇടുക്കി
21
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എറണാകുളം
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പാലക്കാട്
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ആന്ത്രപ്പോളജിക്കൽ സർവേ ഓഫ് ഇന്ത്യ കൊൽക്കത്ത .
ആൾ ഇന്ത്യ ഇൻസ്റ്റിറ്റ്യൂട്ട് ഓഫ് ഹൈജിൻ ആൻഡ് പബ്ലിക് ഹെൽത് കൊൽക്കത്ത .
നാഷണൽ ലൈബ്രറി കൊൽക്കത്ത .
ബൊട്ടാണിക്കൽ സർവേ ഓഫ് ഇന്ത്യ കൊൽക്കത്ത .
രാമകൃഷണ മിഷൻ ഇൻസ്റ്റിറ്റ്യൂട്ട് ഓഫ് കൾച്ചർ കൊൽക്കത്ത .
രാമകൃഷ്ണ മിഷൻ ഇൻസ്റ്റിറ്റ്യൂട്ട് ഓഫ് കൾച്ചർ കൊൽക്കത്ത .
വിക്ടോരിയ മെമ്മോറിയൽ ഹാൾ കൊൽക്കത്ത .
സവോളജിക...
Anizham Tirunal Marthanda Varma 1729–1758.
Karthika Thirunal Rama Varma (Dharma Raja) 1758–1798.
Balarama Varma I 1798–1810.
Gowri Lakshmi Bayi 1810–1815 (Queen from 1810–1813 and Regent Queen from 1813–1815).
Gowri Parvati Bayi (Regent) 1815–1829.
Swathi Thirunal Rama Varma II 1813–1846.
Uthradom Thirunal Marthanda Varma II 1846–1860.
Ayilyam Thirunal Rama Varma III 1860–1880.
Visakham Thirunal Rama Varma IV 1880–1885.
Sree Moolam Thirunal Rama Varma V 1885–1924.
Sethu Lakshmi Bayi (Regent) 1924–1931.
Chithira Thirunal Balarama Varma II 1924–1949.
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