Exam (elaborations)
PHYS 131 - midterm - 2023
Answer key for PHYS 131 midterm, 2023
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Midterm Exam Results for Duong NguyenScore for this quiz: 15 out of 20
Submitted Mar 7 at 6:48p.m.
This attempt took 80 minutes.
pts
Question 1
Consider the three solid cubic blocks in the figure. All have same density,
but different sizes, as shown. The three blocks are hanging from three
strings and are are fully submerged in water. None of the blocks touches
any wall or the bottom of the container.
(a) Rank the buoyant force on the blocks from largest to smallest.
B>C>A
(b) Rank the tensions of the strings from largest to smallest.
B>C>A
(c) Assume now that the cubic blocks have all the same mass, but
different densities. Rank the tensions of the strings from largest to
smallest.
A>C>B
Answer 1:
Correct! B>C>A
, Answer 2:
Correct! B>C>A
Answer 3:
Correct! A>C>B
pts
Question 2
A 373-g mass suspended from a spring oscillates with a period of 0.67 s.
How much mass must be added to the object to change the period to
0.99 s?
Give your answer in grams to three significant figures.
ou Answered
814.3847
orrect Answer 441 margin of error +/- 5%
pts
Question 3
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