Answer:
The density of a hollow lead ball filled with water can be increased when:
- B. remove the water and melt the ball into a solid.
Step-by-step explanation:
To identify the increase in the density of a mixture (water and lead) you must first identify their respective densities which are:
- Water: 1000 kg / m^3
- Lead: 11300 kg / m^3
- Oil: 920 kg / m^3
The calculation of the density in mixtures can be done using the formula:
- The density of a mixture = summed density of the substances/number of substances.
Following the formula, the current density of the proposed mixture can be calculated:
- Density of a mixture = (1000 kg / m^3 + 11300 kg / m^3) / 2
- Density of a mixture = 6150 kg / m^3
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:
- Density = 11,300 kg / m^3 (since it would no longer be a mixture)
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.