Measurements are subject to errors which can sometimes deviate from the true value of an object. The experiment determined the %error (g/cm3) for density and different measuring data of a sphere through various measuring devices. It also aims to determine the deviation data of the sphere.

Average Deviation (a.d.)| 0.046| .0030| .00098|
Average Deviation of the Mean (A.D.)| 0.015| .0016| .00031| Volume (cm3)| 1.803 cm3| 2.089 cm3| 2.092 cm3|
Mass (g)| 16.41 g| 16.41 g| 16.41 g|
Experimental Value of Density (g/cm3)| 9.101 g/cm3| 7.855 g/cm3| 7.844 g/cm3| Accepted Value of Density (g/cm3)| 7.8 g/cm3| 7.8 g/cm3| 7.8 g/cm3| %Error for Density| 16.705%| 0.705%| 0.564%|

The diameter of a sphere using foot rule, vernier caliper and micrometer caliper is shown in Table 1. In order to get the accurate and precise measurements of each, ten trials are made. Micrometer caliper’s experimental value of 7.844 g/cm3 shows the most accurate and precise measurement based on the accepted value of density, which is 7.8 g/cm3. Vernier caliper...

...Experiment 1: Errors, Uncertainties, and Measurements
Joe Mari Isabella Caringal, Rowena Chiang, Khrista Maria Evangelista,
Berthrand Martin Fajardo
Department of Biological Sciences
College of Science, University of Santo Tomas
España, Manila, Philippines
Abstract
All measurements contain a certain degree of error. These errors may be categorized as either Random Error or Systematic Error. The source of random error is inherent and can only be minimized through conducting a series of same trials and using statistics. In contrast, systematic error has a known source and can be removed by following the exact procedure given in an experiment. In the experiment done, these errors were observed through the comparison the results of the measurement taken from a single metal sphere using three different measuring devices namely the foot rule, the Vernier caliper, and the micrometer caliper. The metal sphere was subjected to 10 trials for each measuring device. The diameter of the metal sphere was taken and the mean was obtained which are 1.84cm, 1.900cm, 1.8544cm, respectively. Also, the average deviation of the mean was obtained which are 0.016cm, 0.000cm and 0.0018cm, respectively. Given these values, the percentage of error of each device was computed and yielded 0.89%, 0%,...

...Experiment 1: Errors, Uncertainties and Measurements
Laboratory Report
Kendrick Don Reyes, Myrr Kea Rostrata, Josemarie Emmanuel Roxas, Lindley Susi, Jessica Tabuzo
Department of Biological Sciences
College of Science, University of Santo Tomas
España, Manila Philipines
Abstract
In this experiment, different measuring devices were used, namely the vernier calliper, micrometer calliper, foot rule, and the electronic gram balance. These devices were used to obtain the mean diameter, volume, mass, and the experimental value of density of the sphere of known composition.
1. Introduction
Measurement is the process or act of determining the size, length, quantity, etc. of something being observed or measured. The units of measurement evolved and changed greatly since the day it was made by humans. In different places, these measurements can vary and could well be different from each other. Thus, standards are used nowadays so that we can have a concrete basis and this also prevents fraud or the cheating of somebody especially in business matters.
There are different systems of measurement used. We have this CGS system or known as centimeter-gram-second system which is a metric system derived from the meter-kilogram-second system or mks system. It uses centimeter (c) for
length, gram (g), second (s) for time, dyne for force, and erg for energy....

...Measurement and Uncertainty
When recording data, each entry should be given a corresponding estimated error, or uncertainty. The uncertainty gives the reader an idea of the precision and accuracy of your measurements. Use the following method for finding the uncertainty associated with any measuring device used in lab.
First, find the least count, or the smallest printed increment, of the measuring device. On the meter sticks, the least count is 1 mm. On the double pan balances, the least count is 0.1 g. On the small graduated cylinders, the least count is 25 ml. If you are using the full precision of the instrument, you are probably safe in saying that your measurement is within one least count of the measured value, in either direction.
Figure 1
For example, say you are measuring the object in Figure 1. If you use the meter stick to measure an object's length as being around 86 mm, that means you are pretty sure that the actual value is between 85 mm and 87 mm. Therefore, you should represent your data like this:
l = 86 mm ± 1 mm
In this case, your uncertainty is ± 1 mm. However, you may feel that you are able to attain more precision than is indicated by the least count. In that case, you should do some estimating. By estimating, you divide the least count of your measuring device into imaginary increments. In this lab, it is recommended...

...Experiment 1: Errors, Uncertainties and Measurements
Laboratory Report
Abstract
The success of an experiment greatly depends on how the group is able to execute it and how precise and accurate their results are. In this matter, errors and uncertainties in measurements are of great factor. In this experiment, the group was able to classify the causes of such errors and which measuring device is more precise and accurate than the other. These were obtained by measuring the diameter of an iron sphere with several trials made by each member of the group using measuring devices such as the Foot Rule, the Vernier Caliper and the Micrometer Caliper. The group found out that in measuring, both the Vernier Caliper and the Micrometer Caliper are preferable to use for these can give more accurate measurements compared to what a Foot Rule can. The deviation, volume, mass and density of the iron sphere were also identified.
1. Introduction
Measurements may be ranked among the necessaries of life to every individual in the human society. The knowledge of them, as in established use, is among the first elements of education, and is often learned by those who learn nothing else, not even to read and write. Measurements were among the earliest tools invented by man. Primitive societies needed rudimentary measures for many tasks:...

...Abstract
Measurements are all subject to error which leads to the uncertainty of the result. Errors may come from systematic errors (deterministic error) or random error (not deterministic error). In this experiment, the group measured the diameter of sphere using different kinds of measuring devices (foot rule, vernier caliper, and micrometer caliper) in order to achieve accuracy in the scientific measurements. After experimenting, it was revealed that the micrometer caliper has the lowest percentage of error.
1. Introduction
In the early days, people used mostly human body parts for measuring. And because the measurement depended on the body size and length of the person measuring, it often leads to varying measurements which leads to inaccuracy and errors in the measurements.
In the following years, a better system of units of measurement was developed – the metric system. The metric system is an international decimalized system of measurement, first adopted in France in 1791. Numerous measuring instruments have this system of measurement. Aside from meter sticks and ruler, the vernier caliper and micrometer caliper also use this system.
The vernier caliper is a measuring device which takes advantage of a vernier scale, a scale...

...Experiment 1: Errors, Uncertainties, and Measurements
Laboratory Report
Margarita Andrea S. de Guzman, Celine Mae H. Duran,
Celina Angeline P. Garcia, Anna Patricia V. Gerong
Department of Math and Physics
College of Science, University of Santo Tomas
España, Manila
Abstract
Measurements, defined as a comparison with a standard, are essential in the study of physics. However, all measurements are prone to errors. There are two sources of errors: systematic errors random errors. This experiment aims to show how errors are encountered in measuring an object. Three instruments, namely the foot rule, vernier caliper, and micrometer caliper, were used to measure the diameter of a metal sphere. Ten independent measurements were taken per instrument. Statistical computations were performed to show the accuracy and precision of each instrument. Upon computation of the volume and density of the sphere based from the mean diameter, the percent error for each instrument was computed. At the end of the experiment, it was found that the micrometer caliper is the most accurate instrument in finding the diameter, while the foot rule is the least accurate.
I. Introduction
As early as the ancient times, the need for simple measurements presented itself in tasks, such as constructing...

...Experiment 1: Errors, Uncertainties and Measurements
Laboratory Report
Department of Math and Physics
College of Science, University of Santo Tomas
Abstract
With the use of the ruler, vernier caliper, micrometer caliper and electronic gram scale, the group was able to acquire different sets of measurements by measuring the sphere of unknown composition. The group then was able to compute its mean diameter, average deviation, average deviation of the mean, volume, mass and % percent error for density in SI unit. Then, the members of the group measured the thumb of each other using the ruler and recorded the data in inches.
1. Introduction
During the ancient times, there were many types of measurements used but it was highly unreliable. It was during the late 1700s to 1800s when the SI unit was found and it became the standard of measurement.
The experiment was designed for studying and analyzing errors and how they occur in an experiment, computing the average deviation, mean and the set of average deviation of the mean, familiarizing and comparing the values produced by the vernier caliper, micrometer and the foot rule, and determining the density of an object given its mass and its volume.
2. Theory
In order to prove that no matter how precise your measurements are, there will always be an error. Also,...

...Measurements
Experiment Leader: John Paolo Andes
Members:
Bea Mendoza
Tricia dela Cruz
Jeesza Albis
Era Diana Augusto
Robin Peralta
Franz Mondoñedo
Jan Mykiel Agar
Reginald Turingan
Michael Villaverde
Zoren Eleazar Caspe
Angelo Duque
Paolo Serrano
Dan James Losorata
Aldrin Jay Bondoc
Zeus Marquez
Liezel Pantoja
Date Performed: July 11, 2013
Date Submitted:
I. Objective
To understand the relationship between the construction of a measuring instrument and the precision of the measurements made with it.
II. Equipments
Meterstick
Vernier Calliper
Metal Cylinder
Steel Ball
Platform Balance
Ruler (English and Metric Scale)
Micrometer Calliper
Rectangular Wooden Block
Measuring Cup (Calometer)
1000 ml Graduated Cylinder
III. Theory
The extent of something with respect to some standard. A measurement taken from a body or from an object must have a corresponding number or units. Unit involves three fundamental concepts – length, mass and time—and that all the rest can be derived from this showing the unity of physics.
Vernier Calliper
A vernier calliper (VC) is composed of main scale (MS) and a vernier scale (VS). The MS divisions are centimetres, or in degrees. The graduations on the vernier calliper scale are smaller than the main scale divisions. When the jaws of the calliper are closed, the zero of the MS coincides with the zero of the VS.
The general principle of the...

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