Question 2
In the experiment, the external diameter, D, of a boiling tube is measured with a pair of vernier calipers. A loaded boiling tube with a centimeter scale fixed it is made to float vertically in water as shown in the diagram above.
The depth of immersion, y0, of the zero mark of the scale is measured and recorded.
A mass, m, is put in the boiling tube and the new depth of immersion, y, of the zero mark is measured and recorded. The experiment is repeated for four other increasing values of m.
In each case, y is measured and recorded.
Fig. 2(a) shows the value D, on the Vernier caliper,
Fig. 2(b)shows the values, y0and y1 and
Fig. 2(c) shows the masses, mi where i = 1,2,3,4 and 5.
Observation
(a) OBSERVATIONS
(i) |
Value of D correctly recorded to 2 d.p in cm. |
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(ii) |
Value of A correctly evaluated to at least 2 d.p |
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(iii) |
Value of yo correctly measured and recorded to at least 1 d.p and within tolerance of ± 0.1 cm |
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(iv) |
Five values mi correctly measured and recorded in grammes |
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TABLE OF RESULTS
External diameter D = 2.50 cm Depth of immersion = 9.4 cm A= 0.25 x 3.14 x [2.50]2 = 4.91 cm2
mi/g |
yi± 0.1 cm |
hi= (yi– yo) |
log mi |
log hi |
2 |
9.9 |
0.5 |
0.301 |
-0.301 |
5 |
10.5 |
1.1 |
0.699 |
0.041 |
7 |
10.9 |
1.5 |
0.845 |
0.176 |
10 |
11.4 |
2.0 |
1.000 |
0.301 |
12 |
11.8 |
2.4 |
1.079 |
0.380 |
GRAPH
- Both axes correctly distinguished
- Reasonable scales
- Five points correctlyplotted
- Line ofbestfit
SLOPE
- Largeright-angledtriangle
- ∆Log mcorrectlydetermined
- ∆Log hcorrectlydetermined
- Avoid/avoided parallax error on the scale/vernier caliper/metrerule.
- Avoid/avoided zero error on metrerule.
- Repeated readingsstated.
INTERCEPT, c
Intercept, c, on the vertical axis
Precaution
