Question

Carl had four metal blocks.. Each block was a different type of metal, but it had the same size and volume. All four blocks were weighed on a balance and their masses recorded in the table below. Which one of these metals is the least dense?
Block 1: 65 grams

Block 2: 32 grams

Block 3: 100 grams

Block 4: 79 grams

options:

Block 1


Block 2


Block 3


Block 4

Answer 1

Block 2 was the least dense. I beleive the formula is volume over mass or mass over volume.

Answer 2

Answer is: Block 2 is the least dense.

d(metal) = m(metal) ÷ V(metal).

Volume is the same for all metals, so density only depends on mass of the block of the metal.

Smaller the mass of the block, smaller is the density:

d(block 1) = m(block 1) ÷ V.

d(block 1) = 65 g/V.

d(block 2) = 32 g/V.

d(block 3) = 100 g/V.

d(block 4) = 79 g/V.