PLEASE DO NUMBER 2&4. Data Tables Table 1: Results from Balance Laboratory Penni

Question

PLEASE DO NUMBER 2&4. Data Tables Table 1: Results from Balance Laboratory Pennies Before Minting Mass (g) 1981 Date 1983 Minting Date Mass (g) |laTr, Penny #1 Penny # 2 Penny # 3 lar, 211 |?.aqf,|| |..,.011 I 1993 | 2oT | 2c.1 |2.to2 | 2.5-7 2.50 7 Penny # 1 |135.7 |1979 Penny # 2 Penny # 3 #4 Penny # Sum of the individual masses of pennies minted before 1981 Sum of the 0:1 | individual 1.99 ofpennies minted after 1983 Average mass of the four pennies minted before 1981 the four pennies minted after 1983 Combined mass of all 4 pennies minted *Combined mass of the 4 pennies minted after 1983. before 198I *Place all four pennies on the balance pan at once. Type or answer the questions on a separate sheet of paper Question: A 5 gram weight is placed on a balance, which answer is correct and why? A. 4g C. 4.91g B. 4.9g D.)4.910g it's the cleSor namm Question 2: Given your answer to the Question 1, why would 4.900 be i Question 3: From the average values of pennies minted before 1981 compared to those minted after 1983, can you see a significant difference in the minted pennies by mass alone? Comment on any differences you may have observed. The old Pennie5 arc havier than aFte 33 Pc is Question 4: Does the total mass of pennies massed together equal the sum of the individual pennies? Explain fully!

Explanation / Answer

2) Least count of balalnce is 0.001 g. Hence balance can measure weight with accuracy of 0.001 g. 4.910 g is more accurate then rounding 4.900 g. Thus 4.900 would be inccorect if balance can measure upto 0.001g accuracy.

4) Sum of the individual mass of pennies = 3.081+3.094+3.084+3.039 = 12.298 g

Whereas, Total mass of pennies = 12.312 g

Thus total mass of pennies massed together is not equal to the sum of the individual pennies. The difference is of 12.312 - 12.298 = 0.014 g.

This difference is due to the lack of accuracy in the balance.

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