A block of unknown material, 0.67 ft wide x 0.67 ft high x 1.33 ft long, was weighed in water and found

to weigh 52.6 lb

a) Determine the weight of the block in air, lb

b)

Determine the specific gravity of the material.

c)

If concrete has a specific gravity of about 2.4, could this block be concrete?

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