DAY 113

Essential Question: How does thermal energy flow?

GOALS: SWBAT...

1. Define Covid-19

2. Understand Covid-19

3. Use specific heat, latent heat of fusion, & latent heat of vaporization to solve problems 

WARM-UP 113 (5 min)

https://www.cdc.gov/coronavirus/2019-ncov/index.html

150 infected in USA

14 dead in USA

State Of Emergency in CA and WA

1. What steps can the average person take to prevent the spread of Coronavirus (Covid-19)?

2. Normally there would be 10 ships in the LA port - today there are 4. Factories in China are operating at approximately 40% of capacity. Many items made or assembled in the USA depend on components or ingredients from China, some of which are shipped here using a "Just In Time" model. Thoughts on that?

3. What questions/comments/concerns do you have about Coronavirus?

4. Most of you have strong immune systems. Does that matter?

5. At school, where do you make contact with others on a daily basis?

https://www.brainpop.com/health/diseasesinjuriesandconditions/coronavirus/

More Resources: 

A document for K-12 schools: http://www.publichealth.lacounty.gov/media/Coronavirus/GuidanceSchoolAdministrators.pdf

CA Dept of Health: https://www.cdph.ca.gov/Programs/CID/DCDC/Pages/Immunization/nCOV2019.aspx

World Heath Organization: https://www.who.int/health-topics/coronavirus

List of disinfectants which kill viruses such as Covid-19: https://www.epa.gov/sites/production/files/2020-03/documents/sars-cov-2-list_03-03-2020.pdf

Some of you wondered how long coronaviruses can live on surfaces. No one knows yet, but here's some info that gives us a range: https://www.medicalnewstoday.com/articles/coronaviruses-how-long-can-they-survive-on-surfaces

CLASSWORK

1. Covid-19 Discussion

2. 113A: Practice Problems - Equilibrium Temperature

    Solve #6

need an example? got to 6:20 here: https://www.khanacademy.org/science/physics/thermodynamics/specific-heat-and-heat-transfer/v/specific-heat-and-latent-leat-of-fusion-and-vaporization-2

3. Practice Problems - Latent Heat of Fusion and Vaporization

    Solve #19 and 20

HW/Learning at Home

1. Lab 5 due tonight

2. Solve #7 and 21 from above

3. Wash your hands a wholllllle lot, cough in your elbow, don't touch eyes/mouth/nose/ears with unwashed hands, stay home if you're sick, feel free to wear a mask if you're sick

Essential Question: What is Heat?

GOALS: SWBAT...

1. understand the arrangement, motion, and energy of molecules in each phase

2. describe how molecules in a solid, liquid, and gas compare to each other

3. state how temp relates to the KE of molecules

WARM-UP 113 (4 min)

1. Copy the phase change diagram from the board, or from minute 4:12 from this weekends HW video (https://www.youtube.com/watch?v=ciVM-tTVn28). 

2. Label each of the five sections as

    - liquid

    - solid

    - gas

    - melting/freezing

    - vaporizing/condensing?

3. label the three sections where temperature is changing

CLASSWORK

1. 113A. Understanding Phase Change Diagrams

    Building on the warm up...

    1. label the axes of your phase change diagram (it's a graph, so the vert and horiz parts represent something)

    2. why is the phase change diagram horizontal during melting/freezing, and again during vaporization/condensing? 

2. 113B: The Laws of Thermodynamics

    1. Watch the following video, and define each of the Laws of Thermodynamics

    https://www.youtube.com/watch?v=_Ox6o8y46eQ

    2. Which law is similar to conservation of energy?

    3. For the heat engine (car engine - 5 steps), what does the heat do?

    4. Does the water in the ocean have thermal energy? If it does, why can't some of that energy be used to prime a pump so we can use that energy for our own uses (lights, etc)

    5. Would it be nice if a perpetual motion machine worked? Why?

    6. So, why doesn't a perpetual motion machine work?

LEARNING AT HOME (HW)

113C: Entropy

1. Define "Entropy"

2. Give three examples of entropy that make sense to you as a high school aged person (AKA, don't write something super complex that you don't understand)

Lab is due Wednesday 11:59pm

What are we doing this week?

Ending Thermodynamics. beginning a review of modeling Conservation of Energy, and of Simple Machines.

You: What are simple machines?

Me: https://www.youtube.com/watch?v=Av07QiqmsoA

Also me: https://www.youtube.com/watch?v=3jQXN8SMewo

Tues: Entropy/KWL revisit

Wed: review

Thurs: exam

Fri: Screw, Incline, etc (6 components). Define. explain how each works. Give examples. Put info graphic organizer

Next week: Make Rube Goldberg Machines in groups