student is assigned the task of measuring the mass of one tennis ball using a sc
ID: 1571352 • Letter: S
Question
student is assigned the task of measuring the mass of one tennis ball using a scale for which the zero adjustment on the balance is not working. The student is given three balls and the can in which they were packaged. Which of the following strategies will provide the best determination of the correct mass?
A. Weigh each ball separately and average the results.
B. Weigh the empty can; weigh the can with a ball in it; and compute the difference between the two.
C. Weigh the three balls together and divide by three.
D. Weigh each ball separately, adjusting the beam weights from below first and then from above. Then, average the results.
Explanation / Answer
Option (B) Weigh the empty can; weigh the can with ball in it; and compute the difference beween the two, is the correct option.
Explanation:
If the zero adjustment of the balance is not working, then this is true for both the ball and the ball+can.
So, if the deduct the weights of the two, then the error due to zero adjustment the both the results shall be canceled.
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