Module- Density

- Instructions

Caution:
Before you start this experiment, understand that you are expected to follow directions EXPLICITLY! Take your time and read the directions for each step and for each part of the experiment. You will be required to enter data in a particular format in each table of the Worksheet. You will also be required to enter data in WebAssign in a particular format.

For a printer­friendly version of these instructions, click the Print button in the upper­right corner of this page.

Learning Outcomes

1 Explain how the concepts of motion, forces, momentum, energy, pressure, as well as weight and mass density, relate to common physical situations.

2 Apply the concepts and laws of motion, forces, momentum, energy, pressure, as well as weight and mass density, to solve physical problems.

Mass Density (Will It Sink or Float?)

Step 1: Set­up

Set Density to 1.0 g/cc. NOTE:

In the simulation, density equates to mass density.

Step 2

a
Measure the mass of the small Red Square by placing it on the Scale. Record this mass to one decimal place (e.g., 4.0 or 6.3 or 0.0) in Table 1 on your worksheet.

b
Measure the volume of the Red Square by placing it in the Graduated Cylinder and seeing how the volume increases. Record this volume to one decimal place (e.g., 4.0 or 6.3 or 0.0) in Table 1.

c
Calculate the mass density, recording the value accurate to two decimal places (e.g., 1.356 would be entered 1.36) in the Mass Density column in Table 1. These calculated densities are used again in Tables 2 and 3, where you will need to recopy them.

d
Compare the mass density of the object to the mass density of water (1.0 g/cm3). Predict if it will float. Simply enter Float or Sink in the Prediction column in Table 1.

e
Check your prediction by putting the object in the Pail of Liquid and indicating whether it sank or floated in the Result column in Table 1.

If your prediction was correct, enter Yes; if not, enter No.

f
Repeat Steps 2a-2e for each object listed in Table 1.

Step 3

a
Repeat Step 2 after setting the Density of the liquid to 0.8 g/cc, the density of ethyl alcohol. b
Record your data in Table 2. Remember, you only have to recopy the calculated densities from Table 1.

Step 4

a
Repeat Step 2 after setting the Density of the liquid to 1.3 g/cc, the mass density of glycerin. b
Record your data in Table 3.

1. Use the exact values you enter to make later calculations.

Procedure I: Data - Water

Complete Table 1. Record the mass and volume to one decimal place (e.g., 4.0 or 6.3 or 0.0) and the mass density accurate to two decimal places (e.g., 1.356 would be entered 1.36).

Table 1: Water

Procedure II: Data - Ethyl Alcohol

Complete Table 2.

Table 2: Ethyl Alcohol (0.8 g/cm³)

Procedure III: Data - Glycerin

Complete Table 3.
Table 3: Glycerin (0.8 g/cm³)

2. Please include units in your answer.

- Use the correct unit abbreviation.

- Include a space between the value and the unit.

- To express exponents in your units, use a ^. For example, m/s2 would be m/s^2.

The mass density of an object is 17.3 g/cc, and its volume is determined to be 17.7 cc. What is the mass of the object?

3.

Please include units in your answer.

- Use the correct unit abbreviation.

- Include a space between the value and the unit.

- To express exponents in your units, use a ^. For example, m/s2 would be m/s^2.

The mass density of an object is 16.0 g/cc, and its mass is determined to be 184 g. What is the volume of the object?

4.

Please include units in your answer.

- Use the correct unit abbreviation.

- Include a space between the value and the unit.

- To express exponents in your units, use a ^. For example, m/s2 would be m/s^2.

1. The mass of an object is 334 g, and its volume is determined to be 90 cc. What is the mass density of the object?

5.

Please include units in your answer.

- Use the correct unit abbreviation.

- Include a space between the value and the unit.

- To express exponents in your units, use a ^. For example, m/s2 would be m/s^2.

The SI units of mass density are kg/m3, but there are several other common units. One of the most commonly used units of mass density is gram per cubic centimeter, or g/cc. This is because pure water has a mass density of 1 g/cc. It turns out that 1 mL of liquid is equal to 1 cc of volume. So it is also possible to express the mass density of water as 1 g/mL. This makes water a useful tool since it is possible to use graduated cylinders to measure volumes.

An object with a mass of 28.0 g displaces 437.5 ml of water when it is completely immersed. What is the buoyant force on the mass? (Use g = 9.8 N/kg as necessary.)

Attachment:- Experiment – Instructions.rar