physics on fluids?

Question

An silver block of volume 0.16 m3 is suspended from a spring scale and immersed in a flask of water. Then the silver block is removed, and an aluminum block of the same volume replaces it.
(a) In which case is the buoyant force the greatest, for the silver block or the aluminum block?
the buoyant force is the same for each
aluminum block
silver block

(b) In which case does the spring scale read the largest value?
silver block
aluminum block
the scale reading is the same for each

(c) Use the known densities of these materials to calculate the quantities requested in parts (a) and (b). Are your calculations consistent with your previous answers to part (a) and (b)?
Material Buoyant force Scale reading
silver N N
aluminum N N

Answer 1

According to Archimedes' principle, or the law of upthrust, "When a solid body is partially or completely immersed in a liquid, the buoyant force, or the apparent loss in weight will be equal to the weight of the displaced liquid."

(a) Since the volume of the aluminum block is the same as the silver block, the buoyant force is the same for both.

(b) Since the density of silver is much higher than the density of aluminum, the spring scale read the larger value for the silver block.

(c) You do the calculation to learn.