Question

3. Will the density of aluminum be less or more than the actual value if a student does

not tap the cylinder to remove the air bubbles? Explain why.

Answer 1

The density of aluminum will be underestimated if air bubbles are not removed because they falsely inflate the volume measurement resulting in a lower calculated density.

Step-by-step explanation:

If a student does not tap the cylinder to remove air bubbles while measuring the volume of an aluminum cylinder, the measured density would be less than the actual value. This happens because air bubbles trapped in or on the aluminum while submerged in water will falsely increase the apparent volume of the cylinder. As density is calculated as mass divided by volume, a larger volume due to unremoved air bubbles would result in a calculated density that is less than the true density. Without the air bubbles, the volume measurement would be more accurate and therefore so would the density calculation. To ensure accuracy, the aluminum cylinder should be tapped or manipulated to release any trapped bubbles before final volume measurements are taken.

Answer 2

less dense

Step-by-step explanation:

the reason that the density would be lower is because the air bubbles keep the maximum amount of atoms possible from being in that space. imagine pouring a glass of soda from a freshly opened bottle, at first it looks like there's a lot in the glass but as the bubbles dissipate, there's less and flat soda appears to have even less in the glass. i hope this analogy helped :)