6. Gauging the wire weights
During drying of multifiber 6 the following changes
in weight were measured:
time: .........................13......................29 .......................50.........................65.........................80.......................120.
minutes .........................
loss of weights:
3.9 ...................9.4 ....................17.2 ......................21.8
................... 26.8 .....................32.4 cm of wire. In this experiment will to gauge the
weights
.
-
.
Material
Egyptian two pan scale, Pocket Scale
PS-1 (Conrad Electronic), aluminium foil (about
6 x 6 cm), 1 Yen coin, insulated copper wire ("Y-Draht", D: 2 x 0.6 mm),
checkered paper, scissors. More about weights.
Experiment
1. Tare the scale by lining its
pans with pieces of aluminium foil about 6 x 6 cm (Fig. 1).
2. Put a 1.0 g weight on the left
pan(a 1 Yen coin or 1.0 mL of water are 1.0 g).
3. Balance the scale by adding a
piece of copper wire of the right length to the other pan (Fig. 2).
3. Cut samples of the wire to get
weights of 1.0 g, 500 mg, 100 mg, 10 mg.
4. Control these self-made weights
on a digital scale.
5. Test the sensibility of the
two pan scale by adding a 10 mg weight.
Observations
1. The wire weights show the following
relation between length and mass: 2 x
16 cm = 3208 mm wire: 1000 mg
32 mm wire: 100 mg
3 mm wire: 10 mg (Fig. 3).
2. The pocket scale confirms the
mass of the weights down to 100 mg, the sensibility of the two pan scale
is much higher:
3. The two pan scale has a sensibility
of < 10 mg (Fig.4).
Go on withe the evaluation
of the drying of multifiber 6 experiment
Supplement the graph by adding
the loss of water [mg] versus time.
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modification: 22.02.2006