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 (Board of Trade 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.(chk)

• 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.

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• 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

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• 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.