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Measurements and Experimental Errors

Essay by   •  December 1, 2018  •  Lab Report  •  564 Words (3 Pages)  •  97 Views

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Name: Mamdouh Abdul Dayem

Student ID: 213050715

Measurements and Experimental Errors

Abstract:

The intent of doing this experiment is to get to know the measurements and the calculations of the Mass and the Volume respectively, by using some equipment which have the properties to measure and calculate them as well, and we will also calculate the density after knowing the measurements from the equipment itself. The essential purpose of doing this experiment is to monitor and right down the comparison of the accuracy and the preciseness of these equipment which I mentioned earlier.  

Introduction:    

      4 objects had been given to us which have different shapes and dimensions, we had to use the equipment that were provided to us to measure and calculate the masses and volumes of these objects. Ruler, vernier calliper and micrometre were utilized  for that purpose and an electronic balance was used to calculate the mass, in addition , the diameter of some of these objects could be measured which facilitated our work. We focused in this experiment on the utilizing the suitable equipment so as to get the precise results we aimed to by recognizing the accuracy of each equipment.

USED METIRIALS AND METHOD:

  • Materials:
  1. Ruler: it is a tool that we can measure two different points
  2. Micrometre: it is a device combining calibrated screw it is used to precise

 Measurement between small distances, the object which will be measured placed between the spindle and the anvil

  1. Vernier Scale: it is a device that allow the user to measure more precisely than it could be done by an uniformly-divided or circular measurement scale.
  2. Electronic Balance: it is an essential device that we need, it is weighing device that has digital small screen to show the weight of the chemicals and it is used to measure the precision of carrying out different experiment.
  3. Group of different kinds of rigid bodies.  
  • Method:
  1. Firstly we were given the instructions about the equipment and we were taught how to use them on the objects to get the precise data.
  2. We started with the vernier calliper to measure the height and diameter of the cone by using the formula V=1/3πr2h
  3. After that we moved to sphere where we used the micrometre to measure the radius of it, and also by using the same formula we can calculate the volume as well.
  4. And we moved to the cylinder we calculated the radius of the hole and then we measured the diameter of the base and by using the ruler we calculated the height of it, and after that we calculated the whole volume of the cylinder itself and by using the same formula we subtracted the volume of the cylinder
  5. İf we consider that” a” is the length of each corner as a result “a” would be a3 so the cube has an equal dimensions.

Objects

Volume

Mass

Density

Cube with hole

85,77

130

1,5156814737

cylinder

92,33

126

1,3646702047

Metal ball

9,2

5

0,5434782609

Results:

[pic 1]

Discussion:

At the end of the experiment and after monitoring the results we found out that there was difference between the measurements of the 5 objects, although there was an obvious difference but we could get much better results by using the equipment in the right way. Furthermore we have been discussing about using more accurate equipment to get the exact difference rather the exact result.  

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