The uncertainties of using a ruler and caliper Essay

1487 Words Sep 29th, 2014 6 Pages
The uncertainties of measurements using a ruler, caliper, and spring scales.
Isaiah Gonzales, Roman Acuna
September 19, 2014
Abstract: The experimenters conducted a total of four mini labs. In each lab they had to find measurements dealing with different instruments such as a ruler, caliper, stopwatch, and two spring scales of different newtons. The objective in each experiment was to record and measure different objects and to also give advantages and uncertainties when dealing with different instruments. The experimenters found that each instrument comes with an uncertainty. When dealing with a ruler, the measurement can be very accurate but is not as precise as a caliper. The caliper was the most precise instrument that the
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With the smaller scaled spring, they found it more precise on the newtons side, but only accurate on the grams side. This was the same for the 10 N spring scale. When measuring with the 5 N spring scale they found it to be more precise than the 10 N spring scale.
Experiment part three results-
Table 3: Time Data for Dropped Marble
Drop (Trial) Time (s)
1 .34 s
2 . 35 s
3 .34 s
4 .34s
5 .35 s
In the third experiment, the experimenters used a constant height to drop a marble from. The major uncertainty was the reaction of the experimenter who was recording the height.
Experiment part four results-
Table 4: Mass Set Density Data
Quantity Measurement Uncertainty
Height (cm) 2.302 cm 2.303 cm
Diameter (cm) 2.601 cm 2.602 cm
Radius (D/2) (cm) 1.3005 cm 1.301 cm
Mass (g) 100 g 100.01 g
Density (g/c3) 8.55 g/c^3 N/A
The experimenters used the equation Density = mass/volume. The equation helped them figure out the density of the 100 g mass.
Discussion: The experimenters concluded that with every thing you measure there will always be an

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