10 - PR: Density - measure and calculate

In this practical you will calculate the density of different materials in different ways.


Necessities:
- balance with mass block
- measuring glass 100 mL
- caliper
- regular metal and plastic objects of the same size
- irregular object: "nut"
- cylinder
- spirit
- metal hook

Execution of the test, measurement data and calculations.

1. Balance the balance.

The "grams" from the mass block are either on the balance or in place in the mass block.

Density calculation of a liquid

2. Determine the mass of the empty measuring glass.
3. Determine the mass of the measuring glass filled with 50 mL of spirit.
4. Calculate the mass of the spiritus with this.
5. Calculate the density of the spirit.

Calculate density of two regular (beam-shaped) objects

6. Determine the mass of the regular metal object.
7. Determine (using the caliper gauge) the length, width and height of the metal object.
8. Calculate the volume of the metal object with the formula.
9. Calculate the density of the metal.

10. Determine the mass of the regular plastic item.
11. Determine (using the caliper gauge) the length, width and height of the plastic object.
12 Calculate the volume of the plastic object with the formula.
13. Calculate the density of the plastic.

14. These two regular objects are almost the same size, yet their mass is very different.
Explain how this is possible.

Density calculation of a cylinder

15. Determine the mass of the metal cylinder.

16. How much spirit is there in your measuring glass now?

To determine the volume for the immersion method, use the hook to lower the object into the spirit.
17. Determine the volume of the spirit with the cylinder.
18. Calculate the volume of the cylinder.

19. Calculate the density of the cylinder.
20. From which material can this cylinder be made according to the density table.

Density calculation of the metal nut

21. Determine the mass of the metal nut.

22. How much spirit is there in your measuring glass now?

To determine the volume for the immersion method, use the hook to lower the object into the spirit.
23. Determine the volume of the spirit with metal nut.
24. Calculate the volume of the metal nut.

25. Calculate the tightness of the metal nut.
26. From which material can the metal nut be made according to the density table.

Compare the answer for assignments 19 and 20 with the answer for assignments 25 and 26.
27. What do you notice?
28. Explain the answer to the previous question.