Fall Semester Physics

John Dewey High School

Mr. Klimetz

Triple Beam Balance

Meter Stick (or metric measuring tape)

100 ml graduated cylinder

Large wood block

Small wood block

Aluminum cylinder

Aluminum block

Sheet of aluminum foil

Tap water

Rectangular sponge

Density = Mass/Volume

where mass is expressed either in grams or kilograms, volume is then expressed in either cubic centimeters (or milliliters for liquids) or cubic meters, and density is expressed in either grams per cubic centimeter, grams per milliliter, or kilograms per cubic meter. (It is important to note that the latter is the chosen unit of density for physics since it adheres to the MKS (SI) system of measurement.)

In this particular exercise you are going to

1. determine the mass of selected samples of matter of different size, shape, physical state,

and composition;

2. determine the volume of selected samples of matter of different size, shape, physical state,

and composition;

3. determine the density of selected samples of of matter of different size, shape, physical state,

and composition;

4. explore the mathematical relationships between mass, volume, and density;

5. explore the physical relationships between temperature, pressure, shape, size, composition,

and density;

6. demonstrate operational mastery of the lab apparatus; and

7. demonstrate the mathematical relationships between length, width, thickness, mass, and

density of a rectangular solid.

1. First, determine the masses of the following materials with the triple beam balance:

Large wood block

Small wood block

Aluminum cylinder

Aluminum block

Sheet of aluminum foil

100 ml graduated cylinder

20 ml of tap water

Rectangular sponge

2. Then determine the volumes of the following materials with either the metric ruler or the

graduated cylinder:

Large wood block

Small wood block

Aluminum cylinder

Aluminum block

20 ml of tap water

Rectangular sponge

3. Then determine the density of each material listed below (in grams per cubic centimeter or

grams per milliliter):

Large wood block

Small wood block

Aluminum cylinder

Aluminum block

20 ml of tap water

Rectangular sponge

4. Following the steps and procedures outlined above, determine

the density of the sponge if it were squashed down to a thickness of 1.0 cm;

the density of the sponge with 20 ml of water added to it; and

the area of the sheet of aluminum foil (in square centimeters)

5. Enter all data and calculations on the lines provided below.

6. Answer all questions at the end of the laboratory in full sentences, showing all work and

calculations as required.

Area of a Rectangle = Length x Width

Volume of a Rectangular Solid = Length x Width x Height

Volume of a Right Cylinder = 3.14 x Radius x Radius x Height

Density = Mass/Volume

Large wood block

Small wood block

Aluminum cylinder

Aluminum block

Sheet of aluminum foil

100 ml graduated cylinder

20 ml of tap water

Rectangular sponge

Large wood block

Small wood block

Aluminum cylinder

Aluminum block

20 ml of tap water

Rectangular sponge

Large wood block

Small wood block

Aluminum cylinder

Aluminum Block

20 ml of tap water

Rectangular sponge

Density of sponge squashed to 1.0 centimeter thick

_______________ grams per cubic centimeter

Density of sponge with 20 ml of tap water added

_______________ grams per cubic centimeter

Area of the Aluminum Foil Sheet

_______________ square centimeters

1. Summarize the general relationship between the density of solids and the density of liquids as revealed by

this experiment.

2. List potential sources of error in this experiment.

3. How does this experiment illustrate the relationship between mass and volume in the density equation?

4. What should a graph of mass versus volume resemble if we were to plot the respective mass and volume

values for each body as points in a Cartesian coordinate field and connect each point with a straight

line to the origin? To what is the slope of the plotted line equivalent? (Think!)

5. Based on the data obtained in this experiment, compare, contrast, and explain the observed differences, if

any, between the density of the sponge obtained in procedure 3 and the densities of the sponge

obtained in procedure 4.

6. Based on the data obtained in this experiment, calculate the thickness of the sheet of aluminum foil.

(Think! You have all the data you need to calculate this.) Show all work and remember to include

units in each step.

7. Based on the data obtained in this experiment as well as your knowledge of the metric system, express the

density of tap water in kilograms per cubic meter. Show all work and remember to include units in

each step.

__________ grams

__________ grams

__________ grams

__________ grams

__________ grams

__________ grams

__________ grams

__________ grams

__________ cubic centimeters

__________ cubic centimeters

__________ cubic centimeters

__________ cubic centimeters

____20____ milliliters

__________ cubic centimeters

__________ grams/cubic centimeter

__________ grams/cubic centimeter

__________ grams/cubic centimeter

__________ grams/cubic centimeter

__________ grams/milliliter

__________ grams/cubic centimeter