# In same substances, and if they are

In the density investigation lab, the group observed the physical properties of three objects, a cube, red cylinder, and purple cylinder. The physical properties of an object consist of odor, color, shape, density, and texture. The main focus of this lab was finding the density for each object, which is the mass divided by the volume.

The density of an object shows the differences between them, for instance, if two objects have the same density they are made of the same substances, and if they are different they are made of different substances. The main goal of the lab was to figure out if the objects were made of the same substances, so the group found the answer by finding density. To begin the experiment the group must figure out the mass and volume of each object in order to be able to calculate density. To find the mass they were provided with an analytical scale, which was zeroed out to “0.00g” before used to get a more accurate measure. After placing each object on the analytical scale, the results came out to be: Cube:22.

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000g, Red Cylinder:15.737g, and Purple Cylinder: 18.580g. Now they have the mass it was time to calculate the volume using two different methods, which was Water Displacement and Vernier Calipers. Vernier Calipers were used to measure the length, width, and height of the objects. Once the group found the measurements for the cylinders they had to use the formula, V=?r^2 h which resulted in the measurements: Red Cylinder: 6.31 ?cm?^3, Purple Cylinder: 13.

69 ?cm?^3. Finding the volume of the cube was simple, they used the formula V= L*W*H and got the measurement: 17.36 ?cm?^3. The next method the group used was water displacement, they were provided a 100 mL graduated cylinder with 20 mL of water in it.

The group placed each object in the water to see how much it elevated and then calculated the water displacement to get the volume.

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