Members:
MANUEL, Frances Lauren T.
MARASIGAN, Jhoellah D.
MENDOZA, Erwin James B.
MINGUILLO, Roberto P.
NERA, Franco Niño Angelo P.
NG, Cerwin Jerricho C.
GROUP 5
2FMT

Date Performed: August 27, 2015
Date Submitted: September 3, 2015

EXPERIMENT #1—The Vernier and Micrometer Caliper ABSTRACT In this experiment, the group used a Vernier and micrometer caliper to measure lengths, widths, depths and diameters of various objects. The Vernier and micrometer calipers’ accuracy aided the group to find the volume and density of the objects—namely the steel metal cube, washer and marble. They also used the triple beam balance to weigh the objects. The group compared the density values they computed to the standard value, and also computed for their results’ percentage error. In the end, the group concluded that the micrometer caliper is easier to use, and somehow more error-proof compared to the Vernier caliper.

1. Differentiate the Vernier and micrometer scales.

The Vernier scale has the accuracy of 0.05 mm and the capacity of 155 mm. It has a slider, and is usually used for measuring inside and outside diameter, length and width as well as depth. Meanwhile, the micrometer caliper has the accuracy of 0.01mm and has a 26mm capacity. It has a rotary handle and is usually used for measuring diameters and width.

2. Draw the figure for the micrometer readings below.

a. 3.86 mm

b. 1.59 mm

3. State some of the errors that one might make in measuring length using both the Vernier and micrometer calipers.

Errors in using the Vernier caliper usually involves the decimal digits of the measurements such as the hundreths digit not ending in 0 or 5 and not having 2 decimal places. Another error in using this apparatus may be committed by the reader of the final measurement given by the scale. If the reader is viewing the caliper on a certain angle, he or she could misread the values. Discrepancies may also be caused by uneven or irregular surfaces of the specimen. Errors may also be committed if the scale is holding the measured material loosely, or if the scale is holding to material too tightly that it causes it to deform.

The micrometer caliper, meanwhile, possesses a smaller scale with smaller indications that can easily be missed or mistaken by the naked eye. Like in the Vernier caliper, the scale should also hold the material being measured snugly to get accurate values, but be careful not to deform the object being measured. Errors also may have occurred if the specimen doesn’t have a perfect flat surface.

4. Determine the percentage error for an observed value of 1.112 x 10^ if the standard value is 1.117x10^.