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.
Important UN Years are given below.
1972 പുസ്തക വർഷം.
1973 കോപ്പർനിക്കസ് വർഷം.
1974 ജനസംഖ്യാ വർഷം.
1975 വനിത വർഷം.
1985 യുവജന വർഷം.
1986 ലോക സമാധാനവർഷം.
1987 അഭയാർത്ഥി പാർപ്പിട വർഷം.
1988 എയ്ഡ്സ് വർഷം.
1992 ബഹിരാകാശ വർഷം.
1993 തദ്ദേശിയ ജനസംഖ്യ വർഷം.
1994 കുടുംബ വർഷം.
1995 സഹിഷ്ണുത വർഷം.
1998 സമുദ്ര വർഷം.
1999 വയോജന വർഷം.
2000 കൾച്ചർ ഓഫ് പീസ് വർഷം.
2001 സന്നദ്ധ സേവകാ വർഷം.
...
Permutation and combination related questions are common in PSC and Bank exams.
Before going to Combinations and Permutations, first lean about factorial. .
If \'n\' is a positive integer then, factorial of n is denoted as n! . .
5! = ( 1 x 2 x 3 x 4 x 5 ) = 120.
4! = (1 x 2 x 3 x 4 ) = 24.
Permutations are for lists of items, whose order matters and combinations are for group of items where order doesn’t matter. in other words, .
When the order of items doesn\'t matter, it is called as Combination.
When the order of items does matter it is called as Permutation.
The number of permutations of n objects taken r at a time is determined by using this formula:.
P(n,r)=n!/(n−r)! .
Permutation : Listing your 3 favourite football team in order, from list of...
Please find te parliaments of different countries
Afghanistan - Shora.
Albania - People’s Assembly.
Algeria - National People’s Assembly.
Andorra - General Council.
Angola - National People’s Assembly.
Argentina - National Congress.
Australia - Federal Parliament.
Austria - National Assembly.
Azerbaijan - Melli Majlis.
Bahamas - General Assembly.
Bahrain - Consultative Council.
Bangladesh - Jatia Parliament.
Belize - National Assembly.
Bhutan - Tsogdu.
Bolivia - National Congress.
Botswana - National Assembly.
Brazil - National Congress.
Britain - Parliment (House Of Common’s And House Of Lords).
Brunei - National Assembly.
Bulgaria - Narodno Subranie.
Cambodia - National Assembly.
Canada - Parliament.
China - National People’s Assembly.
Colombi...
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