Pasco TD-8513 Heat Conduction Apparatus Uživatelský manuál stáhnout pdf (Strana 14)

Heat Conduction Apparatus Sample Data

For these sample data, the heat flow rates are:

The wide brass bar has a higher heat flow rate than the narrow brass bar. The data also

show that ∆T in different materials is not directly related to heat flow rate.

B. Heat Pulse

This graph shows the temperatures increasing

(with the switch set to HEAT) before the switch

starts alternating. The apparatus is driven with

a square wave. At the first close thermistor

(upper trace on the graph) the wave resembles a

triangle wave; at the far thermistor is looks

more like a sine wave.

The wave at the far thermistor lags the near

thermistor by 10.5 s. The wave speed is

30 mm/10.5 s = 2.9 mm/s.

Wide Brass 0.36 J/s

Narrow Brass 0.28 J/s

Aluminum 0.28 J/s

Stainless Steel 0.17 J/s

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Pasco TD-8513 Heat Conduction Apparatus Uživatelský manuál Strana 14