The tongue depressor will float on water because its density is less than that of water.
<h3>When do substances sink or float in a liquid?</h3>
Substance will either float or sink in a liquid depending on the comparative densities of the substance and the liquid.
A substance will float in a liquid if it is less dense than the liquid.
A substance will sink in a liquid if it is denser than the liquid.
The density of the tongue depressor = 4.54/6.78 = 0.67 g/cm³
The density of water is 1 g/cm³.
Therefore, the tongue depressor will float on water.
In conclusion, the density of substances determines whether thy float or sink in water.
Learn more about density at: brainly.com/question/952755
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