4. Use the volumes found by displacement to calculate the densities of the objects. Record your data in Table 2.2. density-bar-2.6 rod-.913 Bolt-5.65
5. The accepted values for density are: aluminum = 2.71 g/cm3; PE = about 0.925 g/cm3; and iron = 7.87 g/cm3. Compare your values from Question 4 with these. How do they compare? Why are they different? Note: the density of different kinds of PE and PVC vary because of the difference in the arrangements of their molecules.
6. Calculate the densities of the liquids in Table 2.3. The accepted density of water is 1 g/cm3. How do your results compare? Remember that 1 cm3 = 1 mL.
7. How does the density of water compare with the density of the saturated salt solution? Is this what you would have predicted?
8. Length of room 4.02 m
9. Width of room 3.37 m
10. Height of room 2.35 m
11. Volume of room. m3
12. Mass of air in room. kg
13. Are you surprised by the mass of air in the room? Explain. I
