UNITS OF MEASUREMENT

UNITS OF MEASUREMENT

1. 1 horse power is 745.7 watts
2. • 1 horse power = work equal to lifting 550 lbs of weight to one foot for one second
3. • 1 calorie is equal to 4.2 Joules
4. • 1 barrel is equal to 159 liters
5. • 6 feet = 1 fathom
6. • 1 kwh = 3.6 x 10 power 6 joules
7. • A 100 watt bulb lights for 1 hour uses 100 watt hour of electricity
8. • -273 degree centigrade is called absolute zero temperature.
9. • Standard pressure is 760 mm or 14.7 lb/in2
10. • Gross is equal to 12 dozens
11. • Mach 2 = 500 miles per hour
12. • 1 nautical mile = 1825 meters
13. • Unit of pressure is Pascal
14. • Force is measured in Newton (SI), Dyne (CGS)
15. • At -40 deg F Fahrenheit scale is equal to centigrade scale
16. • Hertz and Angstrom are units of frequency
17. • Units of work and energy are Joule and Erg (CGS)
18. • Diopter is unit of power of lens
19. • Unit is density is kg/m3
20. • Unit of power is watt, BTU (Board of Trade Unit)
1. • Unit of electric charge is Coulomb
2. • Unit of voltage is volt
3. • Unit of electric resistance is ohm
4. • Unit of capacitance is Farad
5. • Unit of magnetic flux is Weber, Tesla
6. • Unit of radio activity is Becquerel
7. • Unit of luminous intensity is candle, lux
8. • Unit of crude oil is Barrel
9. • Unit of volume of water is cusec, cubic/sec
10. • Unit of admittance is Mho
11. • Unit of intensity or loudness of sound is bel
12. • Unit of viscosity is Poise
13. • Unit of flight speed is Mach I
14. • Unit of atmospheric pressure is milli bar
15. • Unit of wave length of light is Angstrom
16. • Unit of energy is Electron volt
17. • Unit of brightness is Lambert
18. • Unit of luminous flux is Lumen
19. • Intensity of illumination or unit of luminosity is Lux, Candela and Candle power
20. • Unit of magnetic pole strength is Weber
22. • Unit of Electric Current is Ampere
23. • Unit of inductance is Henry
24. • Unit of conductance is siemens.
25. • Unit of heat is Joule, Calorie, BTU (British Thermal Unit)
26. • Radio activity is measured in currie
27. • Rutherford : strength of radioactivity
28. • Torr: pressure
29. • Fermi : length [A unit of length equal to one femtometer (10-15 meter)]
30. • Sved berg unit:sedimentation rate
31. • Dioptre: power of lense
32. • Mho : conductivity
33. • Henry: inductance
34. • Maxwell: magnetic flux
36. • Kilo watt hour: power
37. • Coulomb: unit of electrical charge
38. • Weber: unit of magnetic flux
39. • Tesla: unit of magnetic flux density
40. • Siemen: unit of conductance
41. • Rutherford: unit of rate of decay of radioactive material
42. • Faraday: unit of electric charge
43. • Angstrom: unit of length, used especially to specify radiation wavelengths
44. • Parsec: unit of astronomical length
45. • Degree: unit of measurement of an angle
46. • Steradian: Unit of solid angle measurement
47. • Dyne is a unit of Force.
48. • SI unit of pressure is Pascal.
49. • Curie is a unit of : radioactivity
50. • Pascal Sound Pressure
51. • Torr Pressure
52. • Curie Intensity of radioactivity
53. • Angstrom Unit of length
54. • Light year The distance light travels in a year
55. • Dioptre Lens refractive power
56. • Horse power Unit of Power
57. • Radian Unit of angular measure
58. • Candela Unit of luminous intensity
59. • Mole unit of amount of substance
60. • What is measured in units called phon- Sound 192
61. • What is measured in grains – four grains to a carat- Pearls
62. • Unit of electromotive force in Volt.
63. • What is the SI unit of illumination -Lux
64. • Gross is equal to 12 dozen.
65. • Ozone is measured in percent age.
66. • An object traveling at Mach 2 is traveling approximately at 500 mph.(chk)
67. • What is measured on the Gay-Lussac scale: Alcohol strength
68. • Chronometer is used to measure… time
69. • Anemometer is used to measure… Wind Speed
70. • The clusec is the unit measuring the power of what Vacuum pumps
71. • One million cycles per second is called Megahertz.
72. • 0.200 grams are equal to one carat.
73. • Voltammeter is an electrolytic cell for conducting electrolytic dissociation of electrolyte.
74. • 8 furlongs make one mile.
75. • 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.
76. • One inch is equal to 2.5400 cms and one mile is equal to 1.6093 kms.
77. • One micron is equal to One-thousandth of a millimeter.
78. • 2.47105 acres is equal to what SI unit-Hectare
79. • What word describes one tenth of a nautical mile-Cable
80. • What is measured on the Torro scale -Tornados
81. • unit of sound named after- Alexander Graham Bell – Decibel
82. • The density Smoke is measured on the Rngelmann scale-
83. • Unit of electromotive force in Volt.
84. • Power is measured in Watts (w).
85. • Resistance was discovered by Girge Ohm in 1826, and is measured in ohms.
86. • 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).
87. • 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.
88. • The thickness of silk is measured in what- Denier
89. • Ohm’s law does not apply to semiconductors and conductors when there is change in temperature.
90. • In our houses we get 220 V a.c. The value of 220 V represents the effective voltage.
91. • 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
92. • If the same note is played on a flute and a sitar, one can still distirguish b/w them because they differ in quality.
93. • A negatively charged glass rod has always less protons than electrons.
94. • The wavelength of the X-rays is of the order of 0.1 nanometer.
95. • Red, green and blue are known as primary colours. These are colours which cannot be produced by mixing with other colours.
96. • Scattering of light ___ the duration of the day (make)
97. • Oil rises in a wick of oil lamp on account of a property of matter called Capillary Action
98. • a primary cell can ___ be charged again (not)
99. • When a person can see nearer objects but not the distant ones he is said to be suffering from : nearsightedness (myopia)
100. • ATP is a molecule containing high energy bonds.
101. • An example of inorganic compound is carbon monoxide.
102. • The time period of a pendulum on moon increases.
103. • Clinical thermometer usually measures in Fahrenheit.
104. • Tube light emits radiation even after it is disconnected. It is due to Fluorescence.
105. • Shortsightedness can be corrected with the use of Concave.
106. • Rectifier converts AC into DC
107. • Atomic weight of chemical compounds is determined by Mass spectroscopy.
108. • Atomic pile is a place where nuclear fission is made.
109. • Drinker’s apparatus is for measuring the amount of Alcohol in the blood.
110. • Dewar’s flask is called as thermos
111. • The conversion of gases into liquid under high pressure and low temperature is called regulation.
112. • If a green leaf is seen in a red light its color will be black.
113. • Emerge of VIBGYOR from one side of the prism is due to refraction and dispersion of light.
114. • Oxidation is the process in which electron is lost.
115. • Half-time is a time of radioactive substance taken by that substance to decompose radioactivity to half of its weight.
116. • Light energy is stored in the form of chemical energy due to the activity of Chloroplast.
117.  Sunlight is composed of seven colours
118. • Oil rises in a wick of oil lamp on account of a property of matter called Capillary Action
119. • What is a Fata Morgana- Type of Mirage
120. • 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.