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VK2ZRG > TECH     28.05.06 05:25l 49 Lines 2583 Bytes #999 (0) @ WW
BID : 2349_VK2ZRG
Read: DL1LCA GUEST
Subj: Resistivities of metals
Path: DB0FHN<DB0FOR<DB0SIF<DB0IDN<DB0MW<DB0SWR<DK0WUE<7M3TJZ<ZL2BAU<VK6HGR<
      VK7AX<VK2TGB<VK2IO<VK2WI
Sent: 060528/0322Z @:VK2WI.#SYD.NSW.AUS.OC #:15815 [SYDNEY] FBB7 $:2349_VK2ZRG
From: VK2ZRG@VK2WI.#SYD.NSW.AUS.OC
To  : TECH@WW

VK2ZRG/TPK 1.83d Msg #:2349  Date:28-05-06  Time:3:23Z

Hello All,

  On further reading of the Encyclopaedia Britannica I've found a table of
resistivity and temperature coefficient for 41 metals. The values in the
table were at zero degrees Celsius. I made a little programme to do the maths
for resistivity at 20 degrees Celsius. The value for chromium in this table
is different from the value given in the article on chromium in another part
of the encyclopeadia. There the value was 13 micro ohms-cm. I've double
checked the numbers in the table and I don't think I've made any errors in
transcribing them.

               Resistivity    Temp C                    Resistivity   Temp C
 Metal        in micro ê-cm   coeff.      Metal        in micro ê-cm  coeff.
 names         0øC     20øC   * 1E-3      names         0øC   20øC    * 1E-3

Aluminium     2.5      2.7    4.67       Molybdenum    5.03     5.50   4.70
Antimony     32.1     35.4    5.10       Mercury      21.2      ....   ....
Arsenic      26.0     ....    ....       Nickel        6.58     7.47   6.75
Barium       36.0     40.4    6.10       Palladium     9.77    10.51   3.80
Beryllium     2.78     3.20   7.50       Platinum      9.81    10.58   3.92
Bismuth     107.0    117.0    4.45       Potassium     6.3      7.0    5.40
Cadmium       6.73     7.30   4.26       Rhenium      18.9     20.1    3.10
Calcium       3.6      3.9    4.00       Rhodium       4.33     4.73   4.57
Cesium       19.0     20.9    5.00       Rubidium     11.6     12.8    5.30
Chromium     15.0     ....    ....       Silver        1.50     1.62   4.10
Cobalt        5.2      5.9    6.58       Sodium        4.27     4.74   5.50
Copper        1.55     1.68   4.33       Strontium    20.0     22.0    5.00
Gadolinium  140.0    149.7    3.45       Tantalum     12.4     13.3    3.60
Gallium      13.7     14.8    4.10       Thorium      19.1     20.4    3.30
Gold          2.04     2.20   3.98       Tin          10.1     11.0    4.63
Indium        8.2      9.0    5.10       Tungsten      4.89     5.36   4.83
Iridium       4.74     5.15   4.33       Uranium      25.0     ....    ....
Iron          8.71     9.85   6.57       Vanadium     18.2     ....    ....
Lead         19.3     20.9    4.22       Zinc          5.45     5.91   4.20
Lithium       8.5      9.2    4.37       Zirconium    40.5     43.7    4.00
Magnesium     3.94     4.27   4.20

73s from Ralph VK2ZRG@VK2WI.#SYD.NSW.AUS.OC

 Taglines by Colin Coker G4FCN

C Program run, C Program Crash...ReWrite in Pascal!



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