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The Conservation of Momentum

Find the Lab

 In your web browser, go to www.gigaphysics.com, then go to Virtual Labs, and then click

Conservation of Momentum.

 If someone else used the computer for this lab before you, click New Experiment. This will

ensure that you have your own unique cart data when you do the experiment.

Part I: Measure the Carts

 To find the length of the purple cart, use your mouse to drag the cart over the caliper in the

upper left corner of the lab. Convert the length to the SI unit of meters, then record your result

in the table below. Repeat for the green cart.

 Find the masses of the carts by dragging each one in turn over the electronic balance in the

upper right corner. The balance reads in grams, so convert each mass to the SI unit of

kilograms, then record your data.

 These measurements will stay the same as long as you don’t refresh the screen or click the button to start a new experiment. If you don’t complete the lab if one sitting and have to load the lab page again, the lengths and masses will change. If this happens, you will need to measure them again and use the new values for the remainder of the lab.

Part II: Determine the Carts’ Velocities

 Select “same direction” from the Carts’ Direction menu and “inelastic” from the Collision

Behavior menu.

 Click Start Carts to put the carts in motion. The red numbers you will soon see tell you how

many seconds it took each cart to pass through that photogate. If you lose track of which

photogate is measuring which cart, notice the purple and green arrows labelling each; a half

purple/half green arrow is used when both carts were stuck together as they passed through.

You can also click Start Carts if you want to watch the collision again.

 Record your times in the data table at the top of the next page. Also copy the lengths from

part I. Be sure to add the lengths of the two carts when the carts are stuck together.

 Calculate each cart’s velocity and enter it in the table as well.

Mass of purple cart Length of purple cart Mass of green cart Length of green cart

2 

Part III: Calculating Momentum

 Use the fact that momentum equals mass times velocity to calculate the momentum of each

cart. Remember to add the masses when the carts are stuck together.

 Calculate the total momentum of the two carts before and after the collision.

 You should find that the total momentum before and after the collision is identical (at least to

within rounding errors.) If you don’t, you should find out what went wrong and correct it before

you complete the next part.

Part IV: The Elastic Collision

 This time, set the Carts’ Direction to opposite and the Collision Behavior to elastic. Repeat the

same steps as in part II and III. (The data table is at the top of the next page.)

 When you calculate the velocities and momenta, signs matter.

Make sure that carts that are moving to the left have negative

velocities. If you lose track of which direction the carts were

going for each photogate, you have the arrows to help you, and

you can click Start Carts to watch the collision again.

Elapsed time Length Velocity

Purple cart before collision

Green cart before collision

Carts stuck together after collision

Mass Velocity (from part II) Momentum

Purple cart before collision

Green cart before collision

Carts stuck together after collision

Purple cart’s momentum Green cart’s momentum Total momentum

Before collision

After collision ——————– ———————-

3 

Part V: One More Case

 Repeat the experiment once more, this time with any combination of Carts’ Direction and

Collision Behavior you have not used already. Record which settings you use, then complete the

calculations as before.

Carts’ Direction ___________________________ Collision Behavior _________________________

Elapsed time Length Velocity (with sign!)

Purple cart before collision

Green cart before collision

Purple cart after collision

Purple cart before collision

Mass Velocity Momentum

Purple cart before collision

Green cart before collision

Purple cart after collision

Purple cart before collision

Purple cart’s momentum Green cart’s momentum Total momentum

Before collision

After collision

Elapsed time Length Velocity (with sign!)

Purple cart before collision

Green cart before collision

Purple cart after collision

Purple cart before collision

4 

Part VI: Conclusions

What did you notice about the total momentum before the collision and the total momentum after

the collision in each of the above cases?

____________________________________________________________________________________________________________

____________________________________________________________________________________________________________

____________________________________________________________________________________________________________

The principle you should have noted in the previous question is called conservation of momentum.

What do you think it means to say something is conserved in the context of physics?

____________________________________________________________________________________________________________

____________________________________________________________________________________________________________

____________________________________________________________________________________________________________

Do you think there is any combination of conditions in this lab under which momentum would not

have been conserved? Explain your answer.

____________________________________________________________________________________________________________

____________________________________________________________________________________________________________

____________________________________________________________________________________________________________

Learning physics? Teaching physics? Check out www.gigaphysics.com.

© 2016, Donovan Harshbarger. All rights reserved. This activity guide may be reproduced for non-profit educational use. 

Mass Velocity Momentum

Purple cart before collision

Green cart before collision

Purple cart after collision

Purple cart before collision

Purple cart’s momentum Green cart’s momentum Total momentum

Before collision

After collision

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International Union for the Conservation of Nature’s (INUCN)

Assignment: Endangered Biomes

1) Choose an endangered ecosystem you want to learn more about.

Start with the International Union for the Conservation of Nature’s (INUCN), Endangered Ecosystems page.

Here’s a link to the page that describes how they determine which systems are threatened and how they apply their rating system.  

https://www.iucn.org/theme/ecosystem-management/our-work/red-list-ecosystems

Please read the page before continuing.

Make sure you understand the classification system.  You should pick an ecosystem from VU all the way up to CO.  The page explains what these abbreviations mean.

Now go to the Endangered Ecosystems Assessments page at: https://iucnrle.org/assessments/

There is a map with the ecosystems that they have already did assessments for. You can choose one of these.  Click on the colored pin to get more information about the ecosystem.  If you scroll to the bottom of the text box that opens, most will have a link called “English” that takes you to a more in depth document.  You can also scroll below the map and find a list of the ecosystems with links to documents.

2) Using the information on this site and from other credible sources if needed, please answer the following questions about the system you chose.

Please keep you answers brief.  One page and no more than 1.5 should be enough.

a) What is the name of the system and what type of general type of biome is it?

b) What region of the world is it in?

c) How big is it?

d) What is the climate?

e) What are the dominant organisms?  You can keep it general.  You don’t have to report long list of species names.

f) What are the major human-caused factors that have a negative impact on the ecosystem?

g) Are there any actions being taken to reverse the decline?  If so, briefly describe one.’

NO MORE THAN 450 WORDS

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Wildwatch KenyaProject goal is to count, identify and track the giraffes in conservation field sites through trail camera photos

INTRODUCTION TO SCIENCE Citizen science projects are research activities that allow non-scientists to participate in data collection and make contributions to many areas of science from ecology to ast

INTRODUCTION TO SCIENCE

Citizen science projects are research activities that allow non-scientists to participate in data collection and make contributions to many areas of science from ecology to astronomy. These projects are sponsored by individuals, organizations and universities. Activities vary widely from observing and counting birds to completing surveys on pet behavior.

You will be creating a presentation researching one citizen science project from the list below (or you may search the internet for a citizen science project of your choosing). You do not have to participate in the study to complete your assignment, but many of these projects are available for citizen participation all over the world.

  1. Wildwatch KenyaProject goal is to count, identify and track the giraffes in conservation field sites through trail camera photos. https://www.zooniverse.org/projects/sandiegozooglobal/wildwatch-kenya
  2. The Great Backyard Bird CountCitizens collect data on the highest number of birds of each species seen together at one time.http://gbbc.birdcount.org/

Topics you should include in your presentation:

Slide 1Title Slide with Name, Course and Date

Slides 2-3: IntroductionIntroduction and background on your chosen citizen science project, including what questions are being asked and who is asking them. Include a summary of why you chose this project:

  • What is the problem(s) the researchers are trying to solve?
  • Complete additional research to determine what is known about the problem(s).
  • What questions would you like answered?
  • Include supporting images

Slides 4-5Describe any observations or experiments that have been conducted to answer the research question(s). How will this help answer the questions being asked? Include any supporting images.

Slides 6-7Add additional interesting facts you gathered about the citizen project (this may require additional research). Include any relevant images.

Slides 8-9 – ConclusionSummarize your project findings.

  • Why do scientists need the help of citizens to accurately answer their questions?
  • What are some of the pros and cons of using citizens to collect data?
  • Why is this research important?
  • What are the possible real world applications?

Slide 10—ReferencesPlease provide your sources in APA format including the link to your citizen project.

SLP Assignment Expectations

For this SLP assignment you will develop a PowerPoint Presentation that is approximately 1-10 slides in length and addresses the requirements outlined above. Place the text containing the answers to the questions above in the slide area, summarizing each topic using bullet points (in your own words, you may expand in more detail using the notes area). Use 4-5 bullet points per slide. Avoid using lengthy sentences and paragraphs. Maintain consistent font sizes throughout the presentation.

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Wildwatch KenyaProject goal is to count, identify and track the giraffes in conservation field sites through trail camera photos

INTRODUCTION TO SCIENCE

Citizen science projects are research activities that allow non-scientists to participate in data collection and make contributions to many areas of science from ecology to astronomy. These projects are sponsored by individuals, organizations and universities. Activities vary widely from observing and counting birds to completing surveys on pet behavior.

You will be creating a presentation researching one citizen science project from the list below (or you may search the internet for a citizen science project of your choosing). You do not have to participate in the study to complete your assignment, but many of these projects are available for citizen participation all over the world.

  1. Wildwatch KenyaProject goal is to count, identify and track the giraffes in conservation field sites through trail camera photos. https://www.zooniverse.org/projects/sandiegozooglobal/wildwatch-kenya
  2. The Great Backyard Bird CountCitizens collect data on the highest number of birds of each species seen together at one time.http://gbbc.birdcount.org/

Topics you should include in your presentation:

Slide 1Title Slide with Name, Course and Date

Slides 2-3: IntroductionIntroduction and background on your chosen citizen science project, including what questions are being asked and who is asking them. Include a summary of why you chose this project:

  • What is the problem(s) the researchers are trying to solve?
  • Complete additional research to determine what is known about the problem(s).
  • What questions would you like answered?
  • Include supporting images

Slides 4-5Describe any observations or experiments that have been conducted to answer the research question(s). How will this help answer the questions being asked? Include any supporting images.

Slides 6-7Add additional interesting facts you gathered about the citizen project (this may require additional research). Include any relevant images.

Slides 8-9 – ConclusionSummarize your project findings.

  • Why do scientists need the help of citizens to accurately answer their questions?
  • What are some of the pros and cons of using citizens to collect data?
  • Why is this research important?
  • What are the possible real world applications?

Slide 10—ReferencesPlease provide your sources in APA format including the link to your citizen project.

SLP Assignment Expectations

For this SLP assignment you will develop a PowerPoint Presentation that is approximately 1-10 slides in length and addresses the requirements outlined above. Place the text containing the answers to the questions above in the slide area, summarizing each topic using bullet points (in your own words, you may expand in more detail using the notes area). Use 4-5 bullet points per slide. Avoid using lengthy sentences and paragraphs. Maintain consistent font sizes throughout the presentation.

Be sure to include citations referencing your sources on each slide (use either the slide or notes area). Include a descriptive title for each slide that describes the topic being discussed. Be sure to include a title slide with your name, assignment type (ex. SLP Module 1) and course title. Include a slide summarizing your project findings (Conclusion slide). Your final slide should contain a list of references cited in APA format.

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Wildwatch KenyaProject goal is to count, identify and track the giraffes in conservation field sites through trail camera photos.

INTRODUCTION TO SCIENCE

Citizen science projects are research activities that allow non-scientists to participate in data collection and make contributions to many areas of science from ecology to astronomy. These projects are sponsored by individuals, organizations and universities. Activities vary widely from observing and counting birds to completing surveys on pet behavior.

You will be creating a presentation researching one citizen science project from the list below (or you may search the internet for a citizen science project of your choosing). You do not have to participate in the study to complete your assignment, but many of these projects are available for citizen participation all over the world.

  1. Wildwatch KenyaProject goal is to count, identify and track the giraffes in conservation field sites through trail camera photos. https://www.zooniverse.org/projects/sandiegozooglobal/wildwatch-kenya
  2. The Great Backyard Bird CountCitizens collect data on the highest number of birds of each species seen together at one time.http://gbbc.birdcount.org/

Topics you should include in your presentation:

Slide 1Title Slide with Name, Course and Date

Slides 2-3: IntroductionIntroduction and background on your chosen citizen science project, including what questions are being asked and who is asking them. Include a summary of why you chose this project:

  • What is the problem(s) the researchers are trying to solve?
  • Complete additional research to determine what is known about the problem(s).
  • What questions would you like answered?
  • Include supporting images

Slides 4-5Describe any observations or experiments that have been conducted to answer the research question(s). How will this help answer the questions being asked? Include any supporting images.

Slides 6-7Add additional interesting facts you gathered about the citizen project (this may require additional research). Include any relevant images.

Slides 8-9 – ConclusionSummarize your project findings.

  • Why do scientists need the help of citizens to accurately answer their questions?
  • What are some of the pros and cons of using citizens to collect data?
  • Why is this research important?
  • What are the possible real world applications?

Slide 10—ReferencesPlease provide your sources in APA format including the link to your citizen project.

SLP Assignment Expectations

For this SLP assignment you will develop a PowerPoint Presentation that is approximately 1-10 slides in length and addresses the requirements outlined above. Place the text containing the answers to the questions above in the slide area, summarizing each topic using bullet points (in your own words, you may expand in more detail using the notes area). Use 4-5 bullet points per slide. Avoid using lengthy sentences and paragraphs. Maintain consistent font sizes throughout the presentation.

Be sure to include citations referencing your sources on each slide (use either the slide or notes area). Include a descriptive title for each slide that describes the topic being discussed. Be sure to include a title slide with your name, assignment type (ex. SLP Module 1) and course title. Include a slide summarizing your project findings (Conclusion slide). Your final slide should contain a list of references cited in APA format.

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  • Original and non-plagiarized custom papers- Our writers develop their writing from scratch unless you request them to rewrite, edit or proofread your paper.
  • Timely Delivery– primewritersbay.com believes in beating the deadlines that our customers have imposed because we understand how important it is.
  • Customer satisfaction- Customer satisfaction. We have an outstanding customer care team that is always ready and willing to listen to you, collect your instructions and make sure that your custom writing needs are satisfied
  • Confidential- It’s secure to place an order at primewritersbay.com We won’t reveal your private information to anyone else.
  • Writing services provided by experts- Looking for expert essay writers, thesis and dissertation writers, personal statement writers, or writers to provide any other kind of custom writing service?
  • Enjoy Please Note-You have come to the most reliable academic writing site that will sort all assignments that that you could be having. We write essays, research papers, term papers, research proposals. Wildwatch KenyaProject goal is to count, identify and track the giraffes in conservation field sites through trail camera photos. 

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The Resource Conservation and Recovery Act (RCRA) is federal law enacted in 1976 and it gives the Environment Protection Agency (EPA) the powers to control solid wastes considered hazardous.

Your assignment is to prepare and submit a paper on occupational safety and health. The Resource Conservation and Recovery Act (RCRA) is federal law enacted in 1976 and it gives the Environment Protection Agency (EPA) the powers to control solid wastes considered hazardous. The controlling authority over hazardous waste ranges from generation, treatment, transportation, storage to disposal. RCRA does not only involve management of hazardous waste but also nonhazardous solid waste (http://www.law.cornell.edu/wex/resource_conservation_and_recovery_act_rcra). Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) is a federal law enacted in 1980 to assist in controlling releases of specific hazardous wastes. CERCLA is also known as the Superfund. This law empowers the EPA to respond to releases or threatened releases of hazardous substances that may pose a danger on the environment, welfare and public health. CERCLA also empowers the EPA to compel parties responsible for contaminating the environment to remove the hazardous substance, or reimburse CERCLA for response and or EPA’s remediation expenditure (http://www.epa.gov/agriculture/lcla.html). The Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) is a Federal law whose objective is control pesticide distribution, sale and usage. The law requires that all pesticides used in the United States to be registered (Licensed) by EPA (http://www.epa.gov/oecaagct/lfra.html).

S. 1166 Protecting America’s Workers Act-Amends the Occupational Safety and Health Act of 1970 (OSHA-1970) to expand its coverage to federal, state, and local government employees (“S. 1166—112th ”, 2011). The Act gives the Secretary of Labour under specified conditions to cede OSHA-1970 power to another federal agency in accordance with certain occupational standards for such agency’s employees.