How can the density of a hollow lead ball filled with water be increased a remove the water and replace it with air b remove the water and melt the ball into a solid c remove the water and replace it with oil d increase the size of the ball and add more water answer fa

The density of a hollow lead ball filled with water can be increased when:

Explanation:

To identify the increase in the density of a mixture (water and lead) you must first identify their respective densities which are:

The calculation of the density in mixtures can be done using the formula:

Following the formula, the current density of the proposed mixture can be calculated:

It can be identified based on the formula that replacing water with oil or air will not increase the density since its densities are lower than that of water, on the other hand, increasing the size of the ball will increase its mass but also the volume, leaving the density the same as that currently calculated, however, if the water is removed and only the lead is left:

Therefore, the best option to increase the density is to eliminate the water and melt the lead to form a solid that only contains this element.