Calculation of Initial Water Content
- The dry weight of the soil sample can be calculated by subtracting the weight of water from the total weight:
- Dry weight = Total weight - Weight of water = 0.18 kg - 0.02 kg = 0.16 kg
- The initial water content can be calculated using the formula:
- Water content = (Weight of water / Dry weight) x 100%
- Substituting the values, we get:
- Water content = (0.02 kg / 0.16 kg) x 100% = 12.5%

Calculation of Final Weight of the Soil Sample
- The final weight of the soil sample can be calculated by adding the weight of water to the dry weight:
- Final weight = Dry weight + Weight of water = 0.16 kg + 0.02 kg = 0.18 kg

Calculation of Final Volume of the Soil Sample
- The final volume of the soil sample remains the same as before, as the addition of water does not change the volume:
- Final volume = Initial volume = 10^-4m^3

Calculation of Dry Density of the Soil Sample
- The dry density of the soil sample can be calculated using the formula:
- Dry density = Dry weight / Initial volume
- Substituting the values, we get:
- Dry density = 0.16 kg / 10^-4m^3 = 1600 kg/m^3

Calculation of Final Water Content
- The final water content can be calculated using the formula:
- Water content = (Weight of water / Final weight) x 100%
- Substituting the values, we get:
- Water content = (0.02 kg / 0.18 kg) x 100% = 11.11%

Explanation
- The initial water content of the soil sample is calculated using the weight of water and dry weight of the soil sample.
- After the addition of water, the weight of the soil sample increases, but the volume remains the same. Hence, the dry density of the soil sample remains the same.
- The final water content of the soil sample is calculated using the weight of water and final weight of the soil sample.