Theory
The first experiment focused on the concept of errors and uncertainties that are obtained during measurements. For an experiment to be successful, especially those that involve measurements, the number of significant figures must be known. Significant figures are the digits required to express a measured quantity and thus reflect the accuracy of the measurement. Uncertainty is defined as the smallest increment that can be measured and is defined by the instrument used. An error is defined as any deviation from the standard value. Errors could either be systematic or random. Systematic errors are caused by measurements that are not properly calibrated while random errors are caused by chance.

Methodology

Figure 1: Experimental set-up using vernier caliper

Figure 2: Micrometer caliper
In the experiment, three measuring devices are used to obtain the measurement of a sphere with known composition: vernier caliper, micrometer caliper and a foot rule. Ten individual measurements are then made for each of the device. After the measurements are obtained, the mean diameter of the sphere was calculated using the formula: Mean Diameter = Σdiameter

n

Using this data, the deviation of each measurement was calculated,
d = /reading – mean diameter/
as well as its average deviation
(a.d.) = Σd
n
The volume and the density of the sphere were then calculated using the appropriate formula.
Volume (V) = 4/3πr2
Density = mass
volume
Lastly, the percentage error was determined to show how accurate the measurements have been. %Error =
|experimental value – true value| x 100
|true value|

Theory
The displacement Δx of an object is defined as its change in position and is given by
Δx ＝xf – xi
where xi refers to the initial position of an object and xf refers to the final position of an object and its unit is expressed in meter (m).

The average speed of an object over a given length of time...

...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...

...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...

...Abstract
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.
Results and Discussion
Table 1. Diameter and Density of Sphere
| Diameter of Sphere (cm) |
Trial | Foot Rule | Vernier Caliper | Micrometer Caliper |
1 | 1.35 cm |...

...Instrument used for measurement
Making measurement by usisng some instrument or other is inevitable in physic.Hence, ensuring that careful and accurate reading are obtained for any measurement is of utmost importance.Table below shows some most commonly used instrument for making measurement in physics experiments.
|Physical quantity |Instrument |
|Length...

...Dr. Abdalla
Measurement of Length, Mass Volume and Density
Introduction:
All science is concerned with measurement. "MEASUREMENT" is the determination of the size or magnitude of something "Or" The comparison of unknown quantity with some standard quantity of the same rates is known as measurement. Due to this fact we have standards of measurement. Since the precision of all measuring instruments is limited, the...

...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...

...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...

...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...