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Standard units of technology and conversion tables
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Standard units of technology and conversion tables
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High temperature insulation
technology must make economic use of the properties of insulation materials and systems, while observing the laws of physics and chemistry.
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The comprehensive Promat supply
rangesatisfies the demand for optimum planning, calculation and design, right down to the smallest details. Coordinated planning presupposes that the designer determines the physical and chemical requirements and factors of influence according to the system in question. The most appropriate insulating materials, systems and components are then selected to provide maximum efficiency. The following explanations and conversion tables should help you in your selection.
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STANDARD UNITS OF INSULATING TECHNOLOGY
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Basic Units
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Basic Unit
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Unit Symbol
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Basic Value
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Metre
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m
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length
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Kilogram
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kg
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mass
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Second
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s
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time
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Ampere
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A
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electrical current strength
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Kelvin
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K
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thermodynamic temperature
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Candela
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cd
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light intensity
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Derived Units
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Proper Name
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Unit
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Symbol Unit
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Equation Size
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Joule
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J
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1J= 1N1m=1Ws
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heat quantity
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Newton
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N
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1N=1kg1m/1s2=1kg m/s²
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force
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Pascal
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Pa
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1Pa=1N/ 1m²=1N/m²
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mech. tension – pressure
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Volt
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V
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1V=1W/1A=1W/A
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electrical voltage
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Watt
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W
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1W=1J/1s=1J/s
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power, energy capacity,
heat flow
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Conversion from Inch to Milimetre
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in.
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mm
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in.
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mm
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in.
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mm
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in.
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mm
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1/16
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1.59
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1 1/16
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27.0
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2 1/8
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54.0
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4 1/2
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114
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1/8
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3.18
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1 1/8
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28.6
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2 1/4
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57.2
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5
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127
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3/16
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4.76
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1 3/16
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30.2
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2 3/8
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60.36
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5 1/2
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140
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1/4
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6.35
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1 1/4
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31.8
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2 1/2
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63.5
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5
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152
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5/16
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7.94
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1 5/16
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33.3
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2 5/8
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66.7
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6 1/2
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165
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3/8
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9.52
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1 3/8
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34.9
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2 3/4
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69.8
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7
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178
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7/16
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11.1
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1 7/16
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36.5
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2 7/8
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73.0
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7 1/2
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190
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1/2
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12.7
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1 1/2
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38.1
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3
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76.2
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8
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203
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9/16
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14.3
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1 9/16
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39.7
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3 1/8
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79.4
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8 1/2
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216
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5/8
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15.9
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1 5/8
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41.3
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3 1/4
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82.6
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9
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229
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11/16
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17.5
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1 11/16
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42.9
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3 3/8
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85.7
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9 1/2
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241
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3/4
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19.0
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1 3/4
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44.6
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3 1/2
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88.9
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10
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254
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13/16
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20.6
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1 13/16
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46.0
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3 5/8
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92.1
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10 1/2
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266
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7/8
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22.2
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1 7/8
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47.6
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3 3/4
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95.2
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11
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279
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15/16
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23.8
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1 15/16
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49.2
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3 7/8
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98.4
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11 1/2
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292
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1
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25.4
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2
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50.8
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4
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102
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12
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305
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Prefixes for Units
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T Tera =
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10
12
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one billionfold
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G Giga =
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10
9
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one thousand
millionfold
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M Mega =
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10
6
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one millionfold
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k Kilo =
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10
3
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one thousandfold
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h Hecto =
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10
2
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one hundredfold
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da Deca =
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10
1
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tenfold
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d Deci =
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10
-1
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one tenth
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c Centi =
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10
-2
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one hundredth
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m Milli =
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10
-3
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one thousandth
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µ Micro =
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10
-6
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one millionth
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n Nano =
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10
-9
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one thousand millionth
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p Pic =
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10
-12
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one billionth
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Conversion table for Units
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Unit of Energy, Energy Flow, Heat Flow
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W
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kW
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kcal/h
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kp m/s
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PS
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1 W = (= 1 Nm/s = 1 J/s)
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1
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0.001
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0.860
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0.102
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1.36 10
-3
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1 kW =
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1000
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1
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860
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102
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1.36
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1 kcal/h =
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1.16
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1.16 10
-3
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1
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0.119
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1.58 10
-3
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1 kp m/s =
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9.81
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9.81 10
-3
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8.43
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1
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1.33 10
-2
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1 PS =
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736
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0.736
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632
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75
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1
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Units of Energy, Work, Heat Quantity; 1 J = 1 Joule; 1 J = 1 Nm = 1 Ws; 1 J = 0.1 kpm
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J
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kJ
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kWh
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kcal
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kpm
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1 J = (= 1 Nm = 1 Ws)
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1
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0.001
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2.78 10
-7
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2.39 10
-4
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0.102
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1 kJ =
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1000
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1
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2.78 10
-4
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0.239
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102
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1 kWh =
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3.6 10
6
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3.6 10
3
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1
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860
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367 10
3
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1 kcal =
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4.2 10
3
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4.2
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1.16 10
-3
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1
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427
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1 kpm =
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9.81
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9.81 10
-3
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2.72 10
-6
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2.34 10
-3
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1
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Units of Pressure and Strength
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Pa
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bar
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at
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atm
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Torr
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1 Pa = (1 N/m
2
)
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1
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10
-5
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1.02 10
-5
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9.87 10
-6
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0.0075
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1 bar =
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10
5
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1 (1000 mbar)
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1.02
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0.987
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750
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1 at = (1 kp/cm
2
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9.81 10
-4
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0.981
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1
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0.968
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736
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1 atm =
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1.013 10
5
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1.013
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1.033
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1
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760
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1 Torr =
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133
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1.33 10
-3
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1.36 10
-3
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1.32 10
-3
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1
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Temperature Units
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K
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°C
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°R
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°F
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K
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n
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n -273
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4/5
(n -273)
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9/5
(n -273) + 32
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°C
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n + 273
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n
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4/5 n
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9/5 n + 32
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°R
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5/4 n + 273
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5/4 n
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n
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9/4 n +32
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°F
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5/9 (n -32)
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5/9 (n - 32)
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4/9 (n - 32)
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n
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Units of Heat
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Symbol Name
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Dimension
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Conversion Factor
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new
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old
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Q
Heat flow density related
to one unit
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W/m²
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kcal/m² h
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1.163 kcal/m² h = W/m²
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λ
Thermal conductivity
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W/m K
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kcal/m h K
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1.163 kcal/m h K = W/mK
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α
Heat transfer value
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W/m² K
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kcal/m² h K
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1.163 kcal/m² h K = W/m² K
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c
Specific heat
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kJ/kg K
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kcal/kg K
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4.2 kcal/kg K = kJ/kg K
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