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Physics To Win It: Heat Is on challenge. Solar Oven Ideas . Why Solar Ovens . Go Green http ://www.youtube.com/watch?v=KIap7v3NHZ4 Nature Conservancy: Haiti http :// www.youtube.com/watch?v=shqgNSC1O3M Pizza Box http://www.youtube.com/watch?v=xbwliZJiHe8. Your Mission .

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Presentation Transcript
why solar ovens
Why Solar Ovens
  • Go Green
  • http://www.youtube.com/watch?v=KIap7v3NHZ4
  • Nature Conservancy: Haiti
  • http://www.youtube.com/watch?v=shqgNSC1O3M
  • Pizza Box
  • http://www.youtube.com/watch?v=xbwliZJiHe8
your mission
Your Mission
  • To design a solar oven that will create the most thermal energy in 45 minutes using common supplies (cardboard boxes (shoe box, pizza box, larger box, etc.) tin foil, plastic wrap, newspaper, etc.)
  • You must work in groups of 3 or 2 (need team name)
  • You will calculate volume of oven (minimum of 1,000cm3, joules of energy converted, and power of oven
  • You can choose to bring ingredients from the provided recipes (only) to make something for your group/self
provided items
Provided Items
  • Tin foil (about 4 sheets (8.5x11))
  • Plastic wrap (about 4 sheets of 8.5x11)
  • 2 sheets black paper (which I would like back at the end)
  • Glue, staples, tape (not very strong)
items your team must provide
Items Your Team Must Provide
  • The container (be creative!)
  • Extra tin foil (if needed)
  • Extra plastic wrap (if needed)
  • Insulation (if needed)
  • Substitutes for any of the above materials (for example: if you want plexi-glass or something more heavy duty then plastic wrap)
  • Any pre-cooked food items (basically we are only melting or re-heating foods for safety reasons, must come packaged)
warnings
WARNINGS:
  • Please use caution when cutting cardboard, especially with sharp scissors or exacto knives
  • Please only bring food that is pre-cooked and packaged
  • DO NOT LOOK DIRECTLY AT THE SUN!
calendar of events
Calendar of Events
  • 4/2/13 Tuesday: Create Teams, Team Name, Brainstorm Ideas, preliminary list of materials
  • 4/8/13 Monday: GUARDIAN SIGNATURE is REQUIRED. In class time to research design and materials wanted
  • 4/9/13 Tuesday: Final proposal of design, materials, and recipe (if cooking food)
  • 4/16/13 Tuesday: ALL MATERIALS DUE (in class time to assemble solar oven)
  • 4/17/13 Wednesday: COMPLETED SOLAR OVEN DUE
  • HEAT IS ON CHALLENGE DAY: TBD because of weather (hopefully 4/17/13 Wednesday)
rough draft proposal
Rough Draft Proposal
  • Team Name:
  • Team Members:
  • Possible Materials, quanities and Rational/Explanation FOR ALL MATERIALS DESIRED:
  • Design Sketch and LABELED!
grading requirements for each group
Grading Requirements For Each Group
  • Materials Proposal/Solar oven trial 1 (requirements coming) 20pts.
  • Solar Oven, materials must be approved before hand (rough draft proposal) 20pts.
    • (temperature must be raised to at least 100 degrees F )
  • Calculations and final conclusion questions 10pts.
final proposal
Final Proposal
  • Team Name:
  • Team Members:
  • Hypothesis: estimated final temperature _______
  • Possible Materials, quanities and Rational/Explanation FOR ALL MATERIALS DESIRED:
  • Design Sketch and LABELED!
warm up 4 8 13
Warm-up 4/8/13
  • Teach the Teacher: Would you rather be caught picking your nose or picking a wedgie?
  • Review: For every action there is an _______ and equal reaction.
warm up 4 11 13
Warm-up 4/11/13
  • Teach the Teacher: What is the best thing to do on a snow day?
  • Review: What kind of energy does the sun produce (fission or fussion?)
warm up 4 12 13
Warm up 4/12/13
  • Teach the Teacher: What is the best kind of cookie?
  • Review: What is the units for energy?
warm up 4 16 13
Warm-up 4/16/13
  • Teach the Teacher: What was your favorite movie when you were kid?
  • Review: What is the definition of temperature?
warm up 4 15 13
Warm-up 4/15/13
  • Teach the Teacher: What is the best place to take little kids in Rapid?
  • Review: What is newton’s first law?
warm up 4 18 13
Warm-up 4/18/13
  • Teach The Teacher: What is the most annoying animal?
  • Review: What is the gravity #?
warm up 4 19 13
Warm-up 4/19/13
  • Teach the Teacher: How do you like your eggs cooked (scrambled, sunnyside, etc)?
  • Review: What is specific heat?
warm up 4 25 13
Warm-up 4/25/13
  • Teach The Teacher: What is the worst house chore?
  • What is the best?
  • Review: What exactly does temperature measure?
warm up 4 26 13
Warm-up 4/26/13
  • Teach the Teacher: What is the song of choice today?
  • Review: What type of energy depends on your position(height)?
dice it
Dice It
  • Different Types of Shoes
dice it1
Dice It
  • Names of People in TV shows
dice it2
Dice It!
  • Types of Chemical Energy
dice it3
Dice it!
  • Examples of KE
dice it4
Dice It!
  • Where do we get electrical energy from?
dice it5
Dice It!
  • Examples of nuclear energy
dice it6
Dice it!
  • Examples of things that need electricity
dice it7
Dice It
  • Examples of things that have potential energy
slide30

What did they learn they can and can’t do?

  • Rules?
  • IDs?
  • Security guards?
  • How to be successful?
  • How to deal with drama?
  • How to pass classes?
  • Clubs to join?
  • Activities to go see?
  • What’s the best lunch? How to make new friends? 
  • Students can be as creative/funny as they want and still be appropriate. 
warm up 4 30 13
Warm-up 4/30/13
  • Teach the Teacher: What kind of tattoo should I get?
  • Review: What is thermal energy?
solar oven trial 1
Solar Oven Trial 1
  • 1.What were some (at least 2) environmental factors that affected the heat in your oven? Brainstorm ideas to counteract these environmental factors next time.
  • 2.What design modifications would you make to improve your oven’s maximum temperature?
warm up 5 1 13
Warm-up 5/1/13
  • Teach the Teacher: Any May Day stories?
  • Review: What happens to particles in conduction?
  • (mosh pit)
warm up 5 2 13
Warm-up 5/2/13
  • Teach the Teacher: What is the best kind of doughnut?
  • Review: What is convection?
warm up 5 3 13
Warm-up 5/3/13
  • Teach the Teacher: Would you rather always have sticky fingers or always have bad breath…
  • Review: What is the difference between conduction and convection (mosh pit vs. lava lamp)?
warm up 5 6 13
Warm-up 5/6/13
  • Teach the Teacher: Who is the best super villain?
  • Review: What is it called when Thermal Energy moves from a warm to cold substance?
warm up 5 7 13
Warm-up 5/7/13
  • Teach the Teacher: What has been the best assignment of your freshman year?
  • Review: What is the kinetic and potential energy of particles in an object.
solar oven trial 11
Solar Oven Trial 1
  • 1.What were some (at least 2) environmental factors that affected the heat in your oven? Brainstorm ideas to counteract these environmental factors next time.
  • 2.What design modifications would you make to improve your oven’s maximum temperature?
warm up 5 8 13
Warm-up 5/8/13
  • Teach the Teacher: Would you rather have a long summer break, or have a winter and summer break?
  • Review: Mechanical energy is what two things added together?
warm up 5 9 13
Warm-up 5/9/13
  • Teach the Teacher: Do you like to eat fish?
  • Review: Temperature actually measures this……
section 3 notes
Section 3 notes

USING HEAT:

heating systems
Heating Systems
  • Heating systems vary depending on climate
  • Before only stoves/fires used to heat: but is a slow process
forced air systems
Forced Air Systems
  • Furnace warms air, then spreads air using ducts and vents
  • Cool air is

returned to be

heated again

  • Most common

in US

radiator systems
Radiator Systems
  • Closed metal container with hot water or steam
  • Through conduction, thermal energy passed to the surrounding air
electric heating systems
Electric Heating Systems
  • Electric coils in floors heat surrounding air

by conduction,

then convection

currents heats the

rest of the room

solar heating
Solar Heating
  • Buildings use the sun’s radiation in 2 ways
    • Passive: materials easily absorb radiation and heat naturally
    • Active solar: solar cells
passive solar heating
Passive Solar Heating
  • Need lots of south facing windows
active solar heating
Active Solar Heating
  • Uses solar collectors, photovoltaic (PV) cells, or solar panels to create electricity or warm water to radiate heat
thermodynamics
Thermodynamics
  • The study of how thermal energy, heat, and work are related
  • Heat and work increase TE
  • Heat can only move from warm to cold, unless work is done (think about rubbing your hands together)
converting heat to work
Converting Heat to Work
  • Heat engine: converts thermal energy to mechanical energy
    • ME=____+_____
  • Internal Combustion Engines: fuel is burned inside cylinders and turn heat to work
  • http://www.youtube.com/watch?v=w-j8QvsiAdU
    • Converts only 25% of heat to mechanical energy- 75% of heat is lost (that’s why coolant is needed!)
heat movers
Heat Movers
  • Heat movers move TE from one location to another at a different temp
heat mover refrigerators
Heat Mover: Refrigerators
  • Does work so that heat can move from inside refrigerators to outside
  • Needs coolant: evaporates at a low temperature
  • Liquid coolant->gas (cool)->pumped to coils in fridge and TE goes from warm to cold->warm gas compressed doing work-> becomes warmer then outside air and heat flows to outside air, process starts all over again.
air conditioners and heat pumps
Air Conditioners and Heat Pumps
  • Air conditioners: Work like refrigerators, just does the opposite
  • Heat pump: can cool and warm air
human coolant
Human Coolant
  • As sweat evaporates absorbs TE, taking heat away from your body
match it words
Match it Words!
  • Temperature
  • Insulator
  • Conductor
  • Convection Currents
  • Conduction
  • Radiation
  • Heat
  • Specific Heat
  • Combustion
  • Thermal Energy
  • Kinetic Energy
flash card
Flash Card
  • On the Front:
  • Temperature
  • On the back:
  • Measure of KE of atoms in an object
flash card1
Flash Card
  • On the front:
  • Thermal energy
  • On the back:
  • The total of PE + KE of atoms in an object
flash card2
Flash Card
  • On the front:
  • Heat
  • On the back:
  • Thermal energy that flows from high temp. to low temp.
flash card3
Flash Card
  • On the front:
  • Specific heat
  • On the back:
  • Amount of heat that is needed to ^ the temp of 1kg of something 1*C
flash card4
Flash Card
  • On the Front:
  • Conduction
  • On the back:
  • Transfer of thermal energy by collisions of particles
flash card5
Flash Card
  • On the Front:
  • Convection
  • ON the back:
  • The movement and transfer of TE of warm and cold fluids
flash card6
Flash Card:
  • On the front
  • Radiation
  • On the Back:
  • Is the transfer of energy by electromagnetic waves
word bank1
Word Bank
  • Heat engine
  • Radiation
  • Combustion
  • Insulators
  • Specific Heat
  • Conductor
  • Kinetic Energy
  • Vacuum
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