Based on the sketch, you measure that 40% of the block is submerged. Use the first and third sketches to find the density of the block.

Express your answer with the appropriate units.

The accompanying sketches suggest four observations made on a small block of plastic material.

When analyzing Figure 4, it is helpful to keep in mind that the apparent mass of an object in fluid is equal to its mass in air, minus the mass of the fluid displaced

**m _{apparent} = m_{air} − m_{d}**

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