Will a plastic block that has sides that measure 9 cm and its mass is 19.2 grams float on water?

Eric, this really depends on if the block is porus. Could you please respond back with more details? I am willing to help. Also, what is the surface tension of the water?

Find the Density, which is equal to mass/volume, and use the equation density of the block/ density of water. If the density of the block is lower than water, then it will float, if not then it will sink or be submerged. To calculate the density of the block take the weight and divide by (3cm *3cm*3cm).

To determine if the plastic block will float on water, we need to compare its density to the density of water.

Density is defined as the mass of an object divided by its volume. In this case, we are given the mass of the block (19.2 grams), but we need to calculate its volume to determine the density.

The volume of a rectangular block can be calculated by multiplying its length, width, and height. Since all sides of the block measure 9 cm, the volume would be 9 cm x 9 cm x 9 cm = 729 cm³.

Now, we can calculate the density of the block by dividing its mass by its volume: density = mass / volume.

density = 19.2 g / 729 cm³ ≈ 0.0264 g/cm³

To compare this density to that of water, we need to know the density of water. The density of water is approximately 1 g/cm³.

Since the density of the plastic block (0.0264 g/cm³) is much less than that of water (1 g/cm³), the plastic block will float on water.