•
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.