-
then the density was calculated by using the formulae - density = mass
Volume
- all the results were recorded in the table
- Steps 1-5 were then undertaken for each of the other 7 materials left to investigate.
- After all the materials were examined, a graph was then produced of the density of the individual materials.
RESULTS
CALCULATIONS
-
STEEL CYLINDER
VOLUME = 4.1 X 2.2 X π = 62.34 DENSITY = 486 / 62.34 = 7.809 gcm
- BRONZE
VOLUME = 1.4X 1.25X 3.45 = 6.04 DENSITY = 40/6.04= 6.62
- PLASTIC STRIP
VOLUME = 2.2X 3.5 X 4.35= 33.5 DENSITY = 294/33.5 = 8.78 gcm
- WOODEN RULER
VOLUME = 0.12 X 3.2 X 10.05 = 3.86 DENSITY = 4/3.86 = 1.04 gcm
- ALUMMINUJK STRIP
VOLUME = 0.65X 2.5 X 50 = 81.25 DENSITY = 56/81.225= 0.69gcm
- BRASS
VOLUME = 0.09X 3 X 9.9 = DENSITY = 486 / 62.34 = 7.809 gcm
- COPPER
VOLUME = 4.1 X 2.2 X π = 62.34 DENSITY = 486 / 62.34 = 7.809 gcm
CONCLUSION
From my bar graph I can examine that all the metals had very high density especially the brass. From all the metals the aluminium had the lowest density because the reason is that the atomic number of the aluminium is much lesser than any of the other materials. The metals molecules are tightly packed together therefore they have high density but in the aluminium the molecules are tightly packed together although they have very small molecules making them light weight. The plastic and wood had very low density because polymers and wood have very small molecules that are not tightly packed together making them very light weight. Overall form the graph aluminium has the lowest density making it good for being used in engineering where density is significant. On the other hand if in engineering, the aspect of density needed is to be high then brass would be very exceptional.
EVALUATION
In this experiment my aims were achieved and we were successful in finding the density of different materials. I found out that the heaviest material is the brass and the least was the wood the metals were overall all heavy accept for the aluminium which seemed to be light in weight.
To make this experiment better I would choose some more materials and probably more plastics and then compare.
