Activity 5.3 Determining Density

Activity 5.3 Determining Density

Work:

 https://docs.google.com/spreadsheets/d/1uzJkPbMvUqHGvOLioc_FOyqjoY1udXsA4nbhLLGpqDY/edit?usp=sharing
Part I.  Determining Density of a Material

4.         Do your results correspond to published values for the density of steel, Derlin and wood?  If not, why do you think your density value(s) vary from the published values?

The results are close to being the same. The value may vary due to human error when measuring. 

6.         Consider how you might determine the material from which an object is made. If you are given a sample of a metal (which you know is either steel or aluminum), a graduated cylinder and a balance or scale, how could you determine from which metal the object is made? 

I can determine the volume with graduated cylinder by its water-displacement. While I can figure out the mass using scale. Then with the density formula, the material could be identified.

Part II.  Determining the Plastic Materials used in Automoblox Vehicles

1.         Are the Automoblox people made of the same material as the Automoblox wheels? Why do you think so? How might you test your hypothesis?

 They should both be made of polymers of hydrocarbons however they can be different types. I could test by identifying the density.

5.         Does your data support or refute you hypothesis (from number 1 above)?  Explain.

 The tires don't fit in graduated cylinder hence data can't be used to prove or disprove. 

6.         Refer to the Common Materials Density and Uses Chart. Use your results to make an educated guess as to the material used in the manufacture of the Automoblox people and wheels. What other tests might further substantiate your guess?

I am unable to identify. I will also need to test on volume of wheel.

Conclusion

1.      How can you use density to identify a material?

 Different materials have certain density hence can be identified by using known density of certain object and measure the density of unknown object.

2.      What are limitations of the calculated and indirect volume measurement?

Calculated volume  are only as accurate  the measurement for necessary lengths. While indirect volume measurement requires larger volume than volume of object in question. 

3.      Explain the difference between weight and mass.

Weight is the amount of force applied to object by gravity while mass is the amount of matter an object possess.