Physics: Buoyancy Lab

Buoyancy Lab

 By Saturday, August 31, please complete this lab by performing the described buoyancy experiment and completing the lab report. Please see the attached Lab_Report-1 template to help you create the lab report. 

You should be submitting your data table, analysis, and answers to the concluding questions.

 

In this experiment, you will measure the mass of

ice

by noting how much

water

it displaces.

 

Materials:

• a clear, round, drinking glass with straight vertical sides (in other words, cylindrical)

icewater

• a felt tip marker or masking tape
• a metric ruler

Procedure:

In this experiment, you will measure the mass of a handful of ice by observing how much water it displaces. This will be done by measuring how much the water level rises when the ice is placed in a glass of water.

 

1. Using the ruler, measure the diameter of your glass and record in a data table.
2. Find the radius of your glass by dividing the diameter by 2 and record in a data table.
3. Fill the glass halfway with water and mark the level of the water using a marker or masking tape.
4. Place a handful of ice in the water.
5. Mark the new water level using a marker or masking tape. 
6. Using the ruler, measure the increase in water level by measuring the distance between your two marks on the glass. Record in a data table. Repeat your measurement to make sure you have accurate data.

Data Table:

• diameter of glass (cm): D=?
• radius of glass (radius = diameter/2) (cm): r=?
• increase in water level (cm): h=?

Analysis:

1. Find the volume of water displaced. The volume is given by: Where V is the volume, π is 3.14, r is the radius, and h is the increase in water level.
2. Find the mass of the ice. To do this, note that you just found the volume of the water displaced. The mass of this volume of water is equal to the mass of the ice. This mass can be found by: Where m is mass, ρ is the density of water (1 gm/cm3), and V is the volume of water displaced.

Concluding Questions:

1. How does the amount of water displaced depend upon the mass of the ice?
2. Most ice has some air bubbles in it. What effect does this have on the mass of the ice?  What effect does this have on the amount of water displaced?  Is this a concern, or will your measured mass still be correct if air bubbles are present?
3. What are some errors in this experiment?

Buoyancy Lab

By Saturday, August 31, please complete this lab by performing the described buoyancy experiment and completing the lab report. Please see the attached Lab_Report-1 template to help you create the lab report.

You should be submitting your data table, analysis, and answers to the concluding questions.

In this experiment, you will measure the mass of ice by noting how much water it displaces. 

Materials:

· a clear, round, drinking glass with straight vertical sides (in other words, cylindrical)

· ice

· water

· a felt tip marker or masking tape

· a metric ruler

Procedure:

In this experiment, you will measure the mass of a handful of ice by observing how much water it displaces. This will be done by measuring how much the water level rises when the ice is placed in a glass of water.

1. Using the ruler, measure the diameter of your glass and record in a data table.

2. Find the radius of your glass by dividing the diameter by 2 and record in a data table.

3. Fill the glass halfway with water and mark the level of the water using a marker or masking tape.

4. Place a handful of ice in the water.

5. Mark the new water level using a marker or masking tape. 

6. Using the ruler, measure the increase in water level by measuring the distance between your two marks on the glass. Record in a data table. Repeat your measurement to make sure you have accurate data.

Data Table:

· diameter of glass (cm): D=?

· radius of glass (radius = diameter/2) (cm): r=?

· increase in water level (cm): h=?

Analysis:

1. Find the volume of water displaced. The volume is given by:
Where V is the volume, π is 3.14, r is the radius, and h is the increase in water level.

2. Find the mass of the ice.
To do this, note that you just found the volume of the water displaced. The mass of this volume of water is equal to the mass of the ice. This mass can be found by:
Where m is mass, ρ is the density of water (1 gm/cm3), and V is the volume of water displaced.

Concluding Questions:

1. How does the amount of water displaced depend upon the mass of the ice?

2. Most ice has some air bubbles in it. What effect does this have on the mass of the ice?  What effect does this have on the amount of water displaced?  Is this a concern, or will your measured mass still be correct if air bubbles are present?

3. What are some errors in this experiment?

PHY1010 Lab Report Guidelines

The purpose of any laboratory experiment is to stimulate critical thought and encourage the use of multiple resources to deepen understanding. Therefore, all of the information necessary to write a good lab report is located outside the text and is based on your own observations and the research of other scientists. To get started on your lab report you should use the format and structure provided in this document, simply read and remove the bulleted information and populate the headings with the information required of each section.

To write a report in APA format, all section titles should be bolded and aligned to the left and should be written in 12 point, Times New Roman font, using double line spacing options. The reference list must also be in APA format and a sample citation is located below.

Title and Author

Introduction/Purpose/Statement of Problem

Include a short explanation of the objectives of your experiment.

Materials

List everything used to complete your experiment.

Methods/Procedure

Describe the steps you completed during your experiment, include a diagram of the laboratory set up

Results/Data

Include all numerical data recorded in the experiment and present it in tabular (table) format. Describe in your own words, and using the appropriate content, what the data means. This can be combined with the discussion/analysis section.

Discussion or Analysis

The analysis section should contain any calculations and/or inferences you made based on the data. This is where you interpret the data and make connections with the relevant content (concepts, theories). This is also where you would discuss any mistakes you might have made while conducting the experiment (and how they affect your analysis).

Figures & Graphs

Graphs and figures should be included when relevant or required. Label the axes on a graph, being sure to include units of measurement. The independent variable is on the X-axis. The dependent variable (the one you are measuring) is on the Y-axis. Be sure to refer to figures and graphs in the text of your report.

Conclusions

Summary and explain your findings, analysis and/or inferences. This is where you would also refer to the initial hypothesis (was your hypothesis correct?).

References

Cite the references/resources you use for the report in APA format.

Generally, you can site a textbook by placing the author’s name (last name first followed by the first initial of the first name), followed by the date the work was published, the title of the work, and the company that published it. For example:

· Darwin, C. (2003). The Origin of the Species. Signet Classics, New York, NY.

You can cite a website by following similar rules. Cite the author’s name, date of publication, and from where you were able to access the information.

· The American Museum of Natural History. (2011). Darwin. Retrieved from:

http://www.amnh.org/exhibitions/darwin/