Pasco TD-8578 THERMAL EXPANSION APPARATUS Manuel d'utilisateur télécharger pdf (Page 8)

012-07114D Thermal Expansion Apparatus

Res. Temp.

(Ω) (°C)

Res. Temp.

(Ω) (°C)

Res. Temp.

(Ω) (°C)

Res. Temp.

(Ω) (°C)

351,020 0

332,640 1

315,320 2

298,990 3

283,600 4

269,080 5

255,380 6

242,460 7

230,260 8

218,730 9

207,850 10

197,560 11

187,840 12

178,650 13

169,950 14

161,730 15

153,950 16

146,580 17

139,610 18

133,000 19

126,740 20

120,810 21

115,190 22

109,850 23

104,800 24

100,000 25

95,447 26

91,126 27

87,022 28

83,124 29

79,422 30

75,903 31

72,560 32

69,380 33

66,356 34

63,480 35

60,743 36

58,138 37

55,658 38

53,297 39

51,048 40

48,905 41

46,863 42

44,917 43

43,062 44

41,292 45

39,605 46

37,995 47

36,458 48

34,991 49

33,591 50

32,253 51

30,976 52

29,756 53

28,590 54

27,475 55

26,409 56

25,390 57

24,415 58

23,483 59

22,590 60

21,736 61

20,919 62

20,136 63

19,386 64

18,668 65

17,980 66

17,321 67

16,689 68

16,083 69

15,502 70

14,945 71

14,410 72

13,897 73

13,405 74

12,932 75

12,479 76

12,043 77

11,625 78

11,223 79

10,837 80

10,467 81

10,110 82

9,767.2 83

9,437.7 84

9,120.8 85

8,816.0 86

8,522.7 87

8,240.6 88

7,969.1 89

7,707.7 90

7,456.2 91

7,214.0 92

6,980.6 93

6,755.9 94

6,539.4 95

6,330.8 96

6,129.8 97

5,936.1 98

5,749.3 99

5,569.3 100

THERMISTOR CONVERSION TABLE:

Temperature versus Resistance

➁ Calculate ∆T = T

hot

– T

. Record the result in the table.

➂ Using the equation ∆L = αL ∆T, calculate α for copper, steel, and aluminum.

= __________________

Brass

= __________________

Questions

➀ Look up the accepted values for the linear expansion coefficient for copper, brass, and

aluminum. Compare these values with your experimental values. What is the percentage

difference in each case? Is your experimental error consistently high or low?

➁ On the basis of your answers in question 1, speculate on the possible sources of error in

your experiment. How might you improve the accuracy of the experiment?

1 2 3 4 5 6 7 8 9 10

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