Lab 1: Properties of Materials
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Transcript of Lab 1: Properties of Materials
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Group Name: Blue Group Members: Olga Drogomiretskiy, Ingrid Lee,
Asch Warner, Katie Thompson, Rajesh Awal, Drew Barnett
9/29/11
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What is the relation between mass and volume for various objects chosen
from a physics laboratory bin?
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Density Equation
When the mass of an object increases, the volume should also increase
proportionately
There should be a linear relationship between the mass and volume of
objects with the same densities
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Item Mass (g) Volume
(cm^3)
Density
(g/cm^3)
1 2 10 .2
2 4 20 .2
3 6 30 .2
4 8 40 .2
5 10 50 .2
Table and graph that illustrate the linear relationship between the mass and volume in this experiment
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Obtain all needed materials
Measure and record the mass of each of the metal objects using
the electronic scale
Fill a 250mL graduated cylinder with150 mL water
Drop one object into the graduated cylinder, and record the water
displacement
Repeat steps 3-4 for each remaining object
Calculate and record the densities of each object
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Large cylinder: shiny silver color with tube-like shape
Small cylinder: shorter than large cylinder with same shape and shiny
silver color
Thin cylinder: long skinny cylinder with shiny silver color
Rect. cube: rectangular shaped cube, shiny silver color
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Item Mass (g) Volume () Density ()
Large cylinder 61.447 22 2.8
Small cylinder 15.383 6 3
Thin cylinder 25.649 3 9
Rect. cube 21.674 8 3
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Graph 1: Mass vs. Volume with all four objects including outlier
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Graph 2: Mass vs. Volume for three objects excluding outlier
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Three of the objects (the large cylinder, the small cylinder, and the
rect. cube) had very similar densities of approx 3
In the second graph, the three data points that have similar density all
fall on the same trend line and have the same slope of 2.9
All three objects with similar densities, the mass increased
proportionately to the increase in volume, proving our theory correct
The data point excluded from the second graph was the thin cylinder
object. Having a density of 8 with a higher density than the
other three, this data point was not included in the best fit line and
marked as outlier
The outlier does not conflict with our theory because its density did
not correspond to the other measured objects
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The measurements of four objects were recorded and three of them had
the same density.
Graphing these three indicated a linear relationship between mass and
volume; thus, proving our hypothesis correct.
The equation for the best fit line was y = 2.8654x - 1.5514, indicating that
the slope, as density, is about 2.9.
With the fourth data point seen as an outlier, the average density is the
same number.