Pasco TD-8513 Heat Conduction Apparatus User Manual download pdf (Page 15)

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Model No. TD-8513 Sample Data

15

C. Heat Waves

In this graph the far thermistor lags the near

thermistor by 11.1 s. The wave speed is

30 mm/11.1 s = 2.7 mm/s.

The wavelength is 140 mm, about twice the

length of the bar.

Experiment #2: Angstrom’s Method

A. Aluminum

B. Brass

Wide brass bar:

Period (s)

A

c

A

f

∆

tk

(W/m·K) Average

k

(W/m·K)

30

0.671 0.206 5.38 165

1720.673 0.214 5.22 174

0.673 0.219 5.28 176

40

0.912 0.341 6.21 171

1660.909 0.339 6.28 169

0.903 0.330 6.51 159

50

1.09 0.449 7.5 157

1601.09 0.441 7.6 152

1.12 0.471 7.05 171

Average 165

Period (s)

A

c

A

f

∆

tk

(W/m·K) Average

k

(W/m·K)

50

0.430 0.110 10.2 106

107

0.452 0.121 9.7 115

0.426 0.108 11.1 97

0.429 0.118 11.1 103

0.440 0.123 10.3 112

1 2 ... 10 11 12 13 14 15 16 17 18

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