8Density is the ratio of mass to volume, the unit of density for solids or liquids in the metric system is measured in g/ml or g/cm^3. Mass is the amount of matter contained in a particular object, the unit for measuring the mass of an object is represented in kilograms (kg) or grams (g). Volume is the certain amount of space occupied by an object, the unit for measuring the volume of a particular object is represented as millimeter (ml) or cubic centimeter (cm^3). The purpose of this laboratory investigation is to provide an introduction to the concept and applications of density measurements. Several unknown samples of matter will be able to be identified based on the measurement of their density. Performing density measurement on each unknown sample of matter will help understand whether the samples are made of the same material or not. The density of each sample will be calculated from measurements of the mass (weight of the samples) and volume (space of the samples). The materials used in this laboratory investigation are as follows: water, calipers, graduated cylinder, top-loading balance, vernier caliper, and two caps (black and brown). To determine the density of each sample it was necessary to measure the mass of the two caps (black and brown) on a top-loading electronic scale. The mass of the black cap was 6.84 g, while the mass of the brown cap was 0.36 g. The volume is determined by two different methods (volume per length and volume per displacement) to illustrate the accuracy of the data. The general formula for volume per length is given as V= π*r^2*h (where r-Radius-Height and v-Volume). To obtain the exact radius value for each of the caps, the vernier caliper is used to measure the diameter, which is then divided by......half of the paper......^3) ^2*0 . 51 = 0.88 cm^3 The density of the black plug is calculated as follows: D= m ÷ v = 6.84 g ÷ 16.43 cm^3 = 0.416 g/cm^3 The density of the brown plug is calculated as follows: D= m ÷ v = 0.36 g ÷ 0.88 cm^3 = 0.41 g/cm^3 Cap mass (g) Volume per length (cm^3) Density (G/cm^3) Black 6.84 g 16.43 cm^3 0.416 g/cm^3 Brown 0.36 g 0.88 cm^ 3 0.41 g/cm^3 Cap mass (g) Volume per displacement (ml) Density (G/ ml) Black 6.84 g 5.5 ml 1.2 g/ml Brown 0.36 g 2.0 ml 0.2 g/ml Based on density calculated from mass and both methods used to obtain volume. One might conclude that both caps are not made of the same material. Starting from the mass of each cap different from each other, the black cap weighs 6.84 g and the brown cap weighs 0.36 g. The mass (g) data clearly shows that the black cap is heavier than the brown one.