University:
Missouri State University
Course:
PHY 203 | Foundations of Physics I
Academic year:

2021
Views:

212

Pages:

2
Author:

Mohamed Moore

Mystery Cube Density Lab (Day 1) Objective: To discover the identity of each cube based on its density. Materials: Density cube set (9 cubes) Hypothesis: If the mass and volume of a cube is found, then the density of the cube will determine the material of the cube. Procedures: 1. Find the mass of each cube using a balance and record results in the data table. 2. Find the volume of each cube (Length x Width x Height) and record results in the data table. 3. Calculate the density by dividing the mass by the volume and record results in the data table. 4. Identify the mystery cubes based on their densities from the chart below. Known values for cube densities (g/cm3) Acrylic = 1.1 – 1.2 Pine = 0.45 Aluminum = 2.7 Polypropylene = 0.90 – 0.92 Brass = 8.5 PVC = 1.4 Copper = 8.9 Steel = 7.9 Oak = 0.6 – 0.9 Results: Cube # Mass (g) Volume (cm3) Density (g/cm3) 1 2 3 4 5 6 7 8 9 Conclusion: 1. What determines whether a cube will float or sink in water? 2. Which cubes would sink in water? 3. Which cubes would float in water? 4. Describe how you determined the volume of the cubes. 5. Describe how you found the density for each cube. Identity Mystery Cube Density Lab (Day 2) Objective: To discover the slope of a line of a mass vs volume lab is density of the object. Materials: 4 of the same density cube from the set Hypothesis: If the densities of similar cubes are graphed, then the slope of the line will show _____. (fill in the blank) Procedures: 1. Find the mass of one cube using a balance and record results in the data table. 2. Find the volume of one cube (Length x Width x Height) and record results in the data table. 3. Calculate the density by dividing the mass by the volume and record results in the data table. 4. Repeat steps 1-3 adding a block each time. 5. Graph the data using a ruler – be careful to space out each line carefully! y2 – y1 6. Find the slope of the line: rise or mass run or volume x2 – x1 Results: # of Cubes Volume (cm3) Mass (g) Density (g/cm3) 1 ___ 2 ___ + ___ 3 ___ + ___ + ___ 4 ___ + ___ + ___ + ___ Conclusion: 1. Graph the densities of each block (be sure to have a title for the graph, label the axis, put the units, and use a ruler to draw straight lines) 2. What happens to the density if the mass decreases but, the volume remains the same? 3. How does increasing the volume without increasing the mass affect densities? For the graph be sure to: • Title the graph • Label all axes • Draw straight lines (use a ruler) • Space all lines evenly • Find the slope of the line Mass vs Volume 25 40, 20 Mass 20 30, 15 15 20, 10 10 10, 5 5 0 10 20 30 Volume 40