Metal tubes are heated with steam. The linear expansion of three
different metals is determined with the aid of a rotating-shaft
pointer. From this the metals' coefficient of linear expansion is
determined (Supplementary problem). The use of a rolling-shaft
pointer is advantageous because the resulting indication of
expansion is frictionless. The functional principle of a
rotating-shaft pointer can be easily demonstrated in a simple
experiment and studied by the students (see Question 4). The
students should do this before they calculate the change in length
?l in "Evaluation".
Measure the expansion of steel, brass and aluminium while
heating them from room temperature to 100 °C.
| Materiallist (Excerpt) |
Product |
Amount |
|
Butane burner, Labogaz 206 type
|
32178-00
|
1
|
|
Support base variable
|
02001-00
|
1
|
|
Glycerol 250 ml
|
30084-25
|
1
|
|
Iron tube
|
04234-02
|
1
|
|
Collar for linear expansion
|
04231-55
|
1
|
|
Rotating shaft with pointer
|
04236-00
|
1
|
|
Brass tube
|
04234-01
|
1
|
|
Ring with boss head, i. d. = 10 cm
|
37701-01
|
1
|
|
Erlenmeyer flask, wide-neck, 100ml
|
36428-00
|
1
|
|
Boiling beads, 200 g
|
36937-20
|
1
|
|
Support rod, stainless steel, l = 600 mm, d = 10 mm
|
02037-00
|
2
|
|
Universal clamp
|
37718-00
|
1
|
|
Boss head
|
02043-00
|
3
|
|
Aluminium tube
|
04234-03
|
1
|
|
Students thermometer,-10...+110°C, l = 180 mm
|
38005-02
|
1
|
|
Support rod, stainless steel, l = 250 mm, d = 10 mm
|
02031-00
|
1
|
|
Measuring tape, l = 2 m
|
09936-00
|
1
|
|
Glass tube, straight, l=80 mm, 10/pkg.
|
36701-65
|
1
|
|
Silicone tubing i.d. 7mm
|
39296-00
|
1
|
|
Wire gauze 160 mm x 160 mm, ceramic cen.
|
33287-01
|
1
|
|
Butane cartridge C206, without valve
|
47535-00
|
1
|
|
Beaker, 100 ml, low form, plastic
|
36011-01
|
1
|
|
Rubber stopper 26/32, 1 hole 7 mm
|
39258-01
|
1
|
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