Lab Report No 3

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Seneca College *

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241

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Mechanical_engineering

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Jun 13, 2024

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MTR241NIIL JANRUARY 2019 Lab Report No. 3 Density Determination 1

MTR241NIIL JANRUARY 2019 Specification : N/A Procedure : 1) Each sample was laid out on the table, evenly spaced out and a picture was taken of each sample individually with a pencil beside it for scale reference. 2) The dimensions of the sample were taken with the proper measuring devices to the nearest cm to two decimal places and was noted down on the chart provided. 3) The sample was then weighed on a scale to the nearest gram to two decimal places and was noted down on the chart provided. 4) The volume was calculated, and the results were recorded. 5) The density was calculated, and the results were recorded. 6) Steps 2-5 were repeated for each sample from #1 - #7 7) The sample was then put into a bucket which was above a bigger bucket of water and under an appropriate scale 8) The sample was submerged under water and the mass from the scale was recorded on to the chart provided. 9) The volume was calculated using the buoyant method and the results were recorded 10) The correct density was calculated, and the results were recorded. 11) Steps 7-10 were repeated for each sample from #1- #7 2

MTR241NIIL JANRUARY 2019 Sample Description : 3 Sample #1: Concrete Cylinder To the left is sample number one used in the experiment. it was a cylindrical shape, had a rough exterior texture. The material it was made of was concrete and was rated 3 and greater on Mohs scale of hardness. The color of the shape was a mix of grey and light grey/white. Sample #2: Steel Rectangular Prism To the left is the second shape which was used in the experiment. it was rectangular and had a very cool /smooth exterior texture. The material it was made of was steel and was rated 6 and greater on Mohs scale of hardness. Had a dark greyish color with black spots on it.

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MTR241NIIL JANRUARY 2019 4 Sample #3: Concrete rectangular Prism To the left is the third shape which was used in the experiment. it was rectangular and has a very bumpy and rough exterior texture. The material it was made of was concrete and was rated 3 and greater on Mohs scale of hardness. It has a coloration of grey mixed with light grey. Sample #4: Rubber Truncated Cone To the left is the fourth shape which was used in the experiment. it was a was a truncated cone shape and had a very soft, smooth and malleable exterior. The material it was made from was rubber and was rated less than 2 on Mohs scale of hardness. The color of the shape was black. Sample #5: Copper Truncated Cone To the left is the fifth shape which was used in the experiment. It had a shape of a truncated cone and had a smooth exterior texture. The material was very similar to copper or brass and was rated 4 and above on Mohs scale of hardness. The color of the shape was beige with some dark lines.

MTR241NIIL JANRUARY 2019 Sample #7 5 Sample #6 : Wooden Cylinder with void Below is the sixth shape used in the experiment. It had a shape of a cylinder, but when flipped had a cylindrical void in it. The material was some sort of wood and the color was brown with hints of grey. Sample #7: Marble Quadrilateral prism To the left is the seventh and final shape used in the experiment. Its an irregular quadrilateral shape with a smooth texture on the top and bottom but rough and bumpy along the sides. The material was made of marble and was rated 4 and above on Mohs scale of hardness. The color of the shape had a mixture of beige, grey, black, and orange.

MTR241NIIL JANRUARY 2019 Data and Calculations : The calculations that were completed consist of the volume, density, buoyant method density and correct density of each sample. The volume was calculated by using the dimensions of each sample to two decimal places in cm (Appendix – Figure 2, Figure 3, Figure 4). The density was calculated by using the mass of each sample (in air) divided by the volume which was calculated previously and were in units of grams/cm^3 to two decimal places. The buoyant method volume was calculated by subtracting the mass of sample submerged underwater from the mass of sample above the air and was in units of cm^3 to two decimal places. Finally, the correct density of each sample was calculated by using the original mass of each sample (in air) divided by the new buoyant method density which was calculated previously and is in unit’s g/cm^3 to two decimal places. The density, buoyant method volume and the correct density calculations were only done for one sample since it is the sample calculations for each sample (Appendix – Figure 5) Results : 6

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MTR241NIIL JANRUARY 2019 The findings from the results of the experiment and calculations showed us that the mass of each sample in air was significantly greater than the apparent submerged mass. Sample #3 had the greatest difference in volume between the mass in air and submerged mass which shows us that it displaced the most water. Sample #5 had the smallest difference in volume between the mass in air and the submerged mass which shows us that it displaced the least amount of water. The initial density calculated from mass in air and volume is extremely close in values to the correct density calculated using the initial mass in air and the new volume from the buoyant method (Figure 1). (Figure 1 – Density Determination Calculations) Conclusions : N/A Recommendations : N/A 7

MTR241NIIL JANRUARY 2019 Appendix (Figure 1a – Raw data collected when experiment was conducted) 8

MTR241NIIL JANRUARY 2019 (Calculations) 9

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MTR241NIIL JANRUARY 2019 (Figure 2 – Sample #1 – Sample #3 Volume Calculations) (Figure 3 – Sample #4 – Sample #6 Volume Calculations) 10

MTR241NIIL JANRUARY 2019 (Figure 4 – Sample #7 Volume Calculation) 11

MTR241NIIL JANRUARY 2019 12

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MTR241NIIL JANRUARY 2019 (Figure 5 – Calculation for Sample #1 for Original Density, Buoyant Method Volume & Correct Density) 13

Lab Report No 3

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