UNITS OF MEASUREMENT

·   1 horse power is 745.7 watts

·   1 horse power = work equal to lifting 550 lbs of weight to one foot for one second

·   1 calorie is equal to 4.2 Joules

·   1 barrel is equal to 159 liters

·   6 feet = 1 fathom

·   1 kwh = 3.6 x 10 power 6 joules

·   A 100 watt bulb lights for 1 hour uses 100 watt hour of electricity

·   -273 degree centigrade is called absolute zero temperature.

·   Standard pressure is 760 mm or 14.7 lb/in2

·   Gross is equal to 12 dozens

·   Mach 2 = 500 miles per hour

·   1 nautical mile = 1825 meters

·   Unit of pressure is Pascal

·   Force is measured in Newton (SI), Dyne (CGS)

·   At -40 deg F Fahrenheit scale is equal to centigrade scale

·   Hertz and Angstrom are units of frequency

·   Units of work and energy are Joule and Erg (CGS)

·   Diopter is unit of power of lens

·   Unit is density is kg/m3

·   Unit of power is watt, BTU (British Thermal Unit)

·   Unit of electric charge is Coulomb

·   Unit of voltage is volt

·   Unit of electric resistance is ohm

·   Unit of capacitance is Farad

·   Unit of magnetic flux is Weber, Tesla

·    Unit of radio activity is Becquerel

·   Unit of luminous intensity is candle, lux

·   Unit of crude oil is Barrel

·   Unit of volume of water is cusec, cubic/sec

·   Unit of admittance is Mho

·   Unit of intensity or loudness of sound is bel

·   Unit of viscosity is Poise

·   Unit of flight speed is Mach I

·   Unit of atmospheric pressure is milli bar

·   Unit of wave length of light is Angstrom

·   Unit of energy is Electron volt

·   Unit of brightness is Lambert

·   Unit of luminous flux is Lumen

·   Intensity of illumination or unit of luminosity is Lux, Candela and Candle power

·   Unit of magnetic pole strength is Weber

·   Unit of RAD (Radiation Absorbed Dose) is Gray

·   Unit of Electric Current is Ampere

·   Unit of inductance is Henry

·   Unit of conductance is siemens.

·   Unit of heat is Joule, Calorie, BTU (British Thermal Unit)

·   Radio activity is measured in currie

·   Rutherford: strength of radioactivity

·   Torr: pressure

·   Fermi: length [A unit of length equal to one femtometer (10-15 meter)]

·   Sved berg unit: sedimentation rate

·   Dioptre: power of lense

·   Mho: conductivity

·   Henry: inductance

·   Maxwell: magnetic flux

·   Becquerel: radioactivity

·   Kilo watt hour: power

·   Coulomb: unit of electrical charge

·   Weber: unit of magnetic flux

·   Tesla: unit of magnetic flux density

·   Siemen: unit of conductance

·   Rutherford: unit of rate of decay of radioactive material

·   Faraday: unit of electric charge

·   Angstrom: unit of length, used especially to specify radiation wavelengths

·   Parsec: unit of astronomical length

·   Degree: unit of measurement of an angle

·   Steradian: Unit of solid angle measurement

·   Dyne is a unit of Force.

·   SI unit of pressure is Pascal.

·   Curie is a unit of: radioactivity

·   Pascal Sound Pressure

·   Torr Pressure

·   Curie Intensity of radioactivity

·   Angstrom Unit of length

·   Light year The distance light travels in a year

·   Dioptre Lens refractive power

·   Horse power Unit of Power

·   Radian Unit of angular measure

·   Candela Unit of luminous intensity

·   Mole unit of amount of substance

·   What is measured in units called phon- Sound 192

·   What is measured in grains - four grains to a carat- Pearls

·   Unit of electromotive force in Volt.

·   What is the SI unit of illumination -Lux

·   Gross is equal to 12 dozen.

·   Ozone is measured in percent age.

·   An object traveling at Mach 2 is traveling approximately at 500 mph. (Check it)

·   What is measured on the Gay-Lussac scale: Alcohol strength

·   Chronometer is used to measure time

·   Anemometer is used to measure Wind Speed

·   The clusec is the unit measuring the power of what                                Vacuum pumps

·   One million cycles per second is called Megahertz.

·   0.200 grams are equal to one carat.

·   Voltammeter is an electrolytic cell for conducting electrolytic dissociation of electrolyte.

·   8 furlongs make one mile.

·   A billion contain 1000 million. It has 9 zeroes. Similarly a trillion has 12 zeroes, a quadrillion 15 zeroes, a quintillion 18 zeroes and a decillion 33 zeroes.

·   One inch is equal to 2.5400 cms and one mile is equal to 1.6093 kms.

·   One micron is equal to One-thousandth of a millimeter.

·   2.47105 acres is equal to what SI unit-Hectare.

·   What word describes one tenth of a nautical mile-Cable

·   What is measured on the Torro scale-Tornados

·   Unit of sound named after- Alexander Graham Bell - Decibel

·   The density Smoke is measured on the Rngelmann scale-  

·   Unit of electromotive force in Volt.

·   Power is measured in Watts (w).

·   Resistance was discovered by Girge Ohm in 1826, and is measured in ohms.

·   Electricity does not flow through a circuit by itself. It needs a ‘push’, or energy, to keep it moving. We call this energy the voltage of the circuit. Voltage is measured in volts (v).

·   The German scientist George Ohm (1787-1854) is best remembered for working out ohm’s law. He discovered that they voltage across a conductor such as a trip of metal or a wire – and the current following through it always vary in the same proportion. So if you double the voltage, you double the current. This is incredibly useful; because it lets you predict the current you will get for a particular voltage.

·   The thickness of silk is measured in what- Denier

·   Ohm’s law does not apply to semiconductors and conductors when there is change in temperature.

·   In our houses we get 220 V a.c. The value of 220 V represents the effective voltage.

·   One unit of electric power is consumed when 10 A of current flows for 1 hour at 100 V. 1 Unit = 1 kw hr = 1000 w hr = 100 x 10 x 1 hr

·   If the same note is played on a flute and a sitar, one can still distirguish b/w them because they differ in quality.

·   A negatively charged glass rod has always less protons than electrons.

·   The wavelength of the X-rays is of the order of 0.1 nanometer.

·   Red, green and blue are known as primary colours. These are colours, which cannot be produced by mixing with other colours.

·   Scattering of light ___ the duration of the day (make)

·   Oil rises in a wick of oil lamp on account of a property of matter called Capillary Action

·   a primary cell can ___ be charged again (not)

·   When a person can see nearer objects but not the distant ones he is said to be suffering from: nearsightedness (myopia)

·   ATP is a molecule containing high-energy bonds.

·   An example of inorganic compound is carbon monoxide.

·   The time period of a pendulum on moon increases.

·   Clinical thermometer usually measures in Fahrenheit.

·   Tube light emits radiation even after it is disconnected. It is due to Fluorescence.

·   Shortsightedness can be corrected with the use of Concave.

·   Rectifier converts AC into DC

·   Atomic weight of chemical compounds is determined by Mass spectroscopy.

·   Atomic pile is a place where nuclear fission is made.

·   Drinker’s apparatus is for measuring the amount of Alcohol in the blood.

·   Dewar’s flask is called as thermos.

·   The conversion of gases into liquid under high pressure and low temperature is called regulation.

·   If a green leaf is seen in a red light its color will be black.

·   Emerge of VIBGYOR from one side of the prism is due to refraction and dispersion of light.

·   Oxidation is the process in which electron is lost.

·   Half time is a time of radioactive substance taken by that substance to decompose radioactivity to half of its weight.

·   Light energy is stored in the form of chemical energy due to the activity of Chloroplast.

·   Sunlight is composed of seven colours

·   Oil rises in a wick of oil lamp on account of a property of matter called Capillary Action

·   What is a Fata Morgana- Type of Mirage

·   Freon-trademark for any of a number of chemical compounds containing fluorine, and often chlorine or bromine. Use: as solvents, as aerosol propellants, in refrigeration. It is commonly used in refrigerator.