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.
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.