Reference no: EM133084152
Question 1: Which method for calculating the density was more accurate? Why do you think this was the case?
Question 2: List at least three sources of error in this experiment. Which one do you think was the greatest?
Question 3: If you needed to be very precise in your density measurement of an object, how would you improve this method to make it more accurate?
Question 4: What is the radius (not the diameter) of the golf ball, in cm?
Question 5: What is the volume of the golf ball, in cm3?
Question 6: What is the mass of the golf ball, in g?
Question 7: Based on your answers to the previous two questions, what is the density of the golf ball, in g/cm³?
Question 8: What is the mass (in g) of the cup when it is empty?
Question 9: What is the mass (in g) of the cup with the water in it?
Question 10: What is the mass (in g) of the water we added to the cup?
Question 11: What will be the mass (in g) of the cup or beaker with saltwater in it when we have added the prescribed amount of salt?
Question 12: What is the height of the protruding portion of the golf ball (in cm)?
Question 13: What is the depth of the golf ball below the surface of the water (in cm)?
Question 14: Use your answer to Q4, Q13, and Equation 3 to calculate the density of the golf ball (assuming a saltwater density of 1.25 g/cm³).
Question 15: What is the percentage error between your answer to Q7 and your answer to Q14?
Question 16: Which method of measuring the density of the golf ball is more accurate, and why? Identify the largest sources of error in the experiment to justify your answer.
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|
Nominal density(g/cm³)
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Tension difference(N)
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Tension in water(N)
|
Scale reading while submerged(g)
|
|
aluminium
|
2.853107345
|
0.177
|
0.328
|
210.79
|
|
copper
|
8.706896552
|
0.058
|
0.447
|
198.61
|
|
stainless steel
|
7.753846154
|
0.065
|
0.439
|
199.22
|
|
Tin
|
9.882352941
|
0.051
|
0.453
|
197.5
|
|
zinc
|
6.810810811
|
0.074
|
0.43
|
199.74
|
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Material
|
Nominal density(g/cm³)
|
Tension difference(N)
|
density from probe(g/cm³)
|
%Error
|
|
aluminium
|
2.7
|
0.177
|
2.853107345
|
5.670642394
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|
copper
|
8.96
|
0.058
|
8.706896552
|
-2.824815271
|
|
stainless steel
|
8.03
|
0.065
|
7.753846154
|
-3.439026727
|
|
Tin
|
7.31
|
0.051
|
9.882352941
|
35.18950672
|
|
zinc
|
7.133
|
0.074
|
6.810810811
|
-4.516881946
|
|
Material
|
Nominal density(g/cm³)
|
scale reading difference(g)
|
density from scale(g/cm³)
|
%Error
|
|
aluminium
|
2.7
|
32.41
|
1.542733724
|
-42.86171392
|
|
copper
|
8.96
|
44.48
|
1.127473022
|
-87.41659574
|
|
stainless steel
|
8.03
|
43.71
|
1.1450469
|
-85.7403873
|
|
Tin
|
7.31
|
45.37
|
1.103813092
|
-84.8999577
|
|
zinc
|
7.133
|
43.11
|
1.162839248
|
-83.69775342
|