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17. An absent-minded scientist weighed a metal block in,
10
i.
air
ii.
half-submerged in water
iii. fully submerged in water
iv. fully submerged in a strong salt solution
Unfortunately, his results became mixed up, but here they are: 5 N, 8 N, 10 N
and 6 N. Which reading did the scientist obtain for each weighing?