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CHAPTER 15: ENERGY!

CHAPTER 15: ENERGY!. RESOURCES. Vocabulary Review: Quizlet Ch 15 Doodle Science Playlist: High School Physics BILL Nye: Energy (30 min.).  Kahoot to review OR work on late work quietly. Review: Quizlet Live : Ch. 15 ENERGY Terms Kahoot – Work Power Machines Kahoot - ENERGY.

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CHAPTER 15: ENERGY!

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  1. CHAPTER 15: ENERGY!

  2. RESOURCES • Vocabulary Review: QuizletCh15 • Doodle Science Playlist: High School Physics • BILL Nye: Energy (30 min.)

  3. Kahoot to review OR work on late work quietly Review:Quizlet Live : Ch. 15 ENERGY TermsKahoot – Work Power Machines Kahoot - ENERGY

  4. SMartStarter • List as many types and forms of energy as you can think of! (Feel free to represent them in drawing form if you would rather)

  5. SS –PhysSci  List three different ways you have used energy today.  Where does the energy you use come from?

  6. SS –PhysSci L M 1. 2. 3. 5. 4. •  Where is the highest PE? Why? • Where are the PE and KE almost the same? • How do you know?

  7. SS –PhysSci --- Follow up  Where is the highest PE?  Where are the PE and KE almost the same?

  8. At what point would a car on the track have the greatest PE? KE? Explain WHY?! B F D G C A E Lab Questions: How does height affect speed? How does PE affect KE?

  9. SS –Phys Sci An object has a kinetic energy of 14 J and a mass of 17 kg , how fast is the object moving?

  10. How many questions have you completed on your EXAM Study Guide?How many do you have left?When specifically will you make time to complete them? SmartStarter -

  11. Attendance &Good Things!

  12. SmartStarter - ANSWER Who has the most done on their STUDY GUIDE? Good Job!!!Preparation proceeds Success!

  13. PHY SCI -- TODAYAssignment: On a piece of paper, write 10 facts about alternative energy that you learn from this video.  Watch HBO VICE: The Future of ENERGY (25 min.) Click link to watch  …don’t forget your name and period

  14. Extra TIME?  QUIETLY work on your Study Guides– Use the links on the next slide for review…or teach them how to be successful in life through wise stories

  15. Energy: The ability to do work Work = Force x distance Measured in joules!

  16. ENERGY

  17. The ability to do work (F*d). THERMAL MECHANICAL NUCLEAR ELECTRICAL CHEMICAL joules (J) Energy internal motion of particles ENERGY Motion or position of objects changes in the nucleus motion of electric charges bonding of atoms

  18. Forms of Energy: Kinetic: energy of movement (depends on massand velocity) Bozeman AP Physics Kinetic & Potential Potential Energy Kinetic Energy

  19. Forms of Energy: Potential: energy of position - gravitational: depends on mass, height and acceleration due to gravity - elastic: depends on ability to be stretched or compressed - chemical: stored in bonds - electrical: associated with charge - nuclear: stored in the atomic nucleus - electromagnetic: waves (light/rays/sound)

  20. Calculating Potential Energy m = mass (kg) g = acceleration due to gravity (9.8 m/s2) h = height (m) PE = potential energy (Joules) Doodle Science GPE and Kinetic Energy

  21. Calculating Potential Energy Example Problem A mover carries a television with a mass of 62 kg a distance of 18 m up the stairs. How much potential energy does the TV have? PE = (62)(9.8)(18) = 10,937 J

  22. Calculating Potential Energy Practice Problem PE = (m)(g)(h) A 74 kg man at the top of a ladder is 8 m off the ground while attaching Christmas lights. How much potential energy does the man have? PE = (74)(9.8)(8) = 5,802 J

  23. Calculating Kinetic Energy m = mass (kg) v = velocity (m/s) KE = kinetic energy (Joules)

  24. Calculating Kinetic Energy What is the kinetic energy of a 75-kg student running at a speed of 3 m/s?

  25. Which has the most KE? • Which has the least KE? 80 km/h 50 km/h 80 km/h • Kinetic Energy (KE) • energy in the form of motion • depends on mass and velocity 80 km/h truck 50 km/h motorcycle

  26. Practice: KE Math A silverback gorilla can run at a speed of about 25 mph (11.2 m/s). The tallest gorilla recorded was a 1.95 m (6 ft. 5 in) silverback with an arm span of 2.7 m (8 ft. 10 in), a chest of 1.98 m (6 ft 6 in), and a weight of 219 kg (483 lb), shot in Alimbongo, northern Kivu in May 1938. What would the kinetic energy of the gorilla be if it had charged the shooter?

  27. Practice: KE Math A silverback gorilla can run at a speed of about 25 mph (11.2 m/s). The tallest gorilla recorded was a 1.95 m (6 ft 5 in) silverback with an arm span of 2.7 m (8 ft 10 in), a chest of 1.98 m (6 ft 6 in), and a weight of 219 kg (483 lb), shot in Alimbongo, northern Kivu in May 1938. What would the kinetic energy of the gorilla be if it had charged the shooter?

  28. Practice: KE Math The maximum operating speed of a N700 bullet train is 320 km/h. The mass of a 16 car set is 715 metric tons. What is the kinetic energy of a N700 Bullet Train at its top operation speed? HINTS 1 metric ton = 1000 kg 1 m/s = 3.6 km/h

  29. The Law of Conservation of Energy Energy is never created or destroyed – it is transformed from one form to another. (PE+KE)Beginning = (PE+KE)End

  30. ENERGY Transformations • EXAMPLES: • PE  KE • mechanical  thermal • chemical  thermal PE  KE

  31. Conservation of Energy: Example Problem If 2500-kg roller coaster car begins its descent from 500 m above the first hill, what is its kinetic energy at the bottom of that hill? PE = (2500)(9.8)(500) = 12,250,000 J = KE!

  32. The Law of Conservation of Energy Often, kinetic energy will be transformed into thermal energy, via FRICTION. This is the reason we always LOSE efficiency when work is done!

  33. Mechanical (ME = KE + PE)  Thermal

  34. Conservation of Energy: Practice Problem Happy Gilmore. -> PG-13 :/ Happy's Long Drive If 0.5 kg golf ball begins its descent from a long drive 30 m above the green, what is its mechanical energy at that moment if the ball is traveling at 90 m/s (~200 mph)? ME = PE + KE FUN FACT: The highest recorded ball speed is 226 mph by Connor Powers during the Quarterfinals of the 2014 World Long Drive Championship.

  35. SmartStarter Give two examples of non-renewable energy resources AND Give two examples of renewable energy resources

  36. Renewable & Nonrenewable Energy Sources

  37. Renewable & Nonrenewable Energy Sources ENERGY SOURCES JIGSAW – gClass Room ????? Exploring alternative energy sources (PBS) Off the Grid – Energy Management Activity - Jason Project-Energy City Game student handout Renewable Energy 101 | National Geographic (3 min.)

  38. Renewable Energy APES Renewable Energy BOZEMAN -9 min.

  39. Energy Resources • History of Human Energy Use: CC 7 min. • Non-renewable Energy Resources: Doodle • Renewable Energy Resources: Doodle 1 & Doodle 2 • Which country runs on 100% renewable energy? 4 min • Discovery Channel: Powering the Future (article) • National Geographic Channel - Free Power Energy Future Prospect (44 min.) Energy  National Grid NOVA Energy Lab - NOVA 2011 – Power Surge

  40. EARTH DAY How well do you know your planet? Jeopardy 4 Teams In Energy Folder…

  41. YOUR TURN TO DOODLE  Writing/Drawing Assignment • On a piece of paper draw & LABEL: • A building with a purpose of your choice • (i.e. gym/school/house, etc.) • Must use 4 types of Energy Resources • Strive for a sustainable design. • Write a paragraph about your building: • What is its purpose? • How does the design conserve energy? • What energy resources does it use? • Is this practical? Could you market this design? Why or Why not?

  42. Exploring Alternative Energy Sources(PBS) Day 1: Research  HW -- 9 different topics + others Day 2: Poster or gCR Slides – Rubric DRAFT Day 3: Summary Grid Share – Notes Grid

  43. Ch. 15 - Energy Energy and Work Work & Energy Conservation of Energy

  44. THERMAL The ability to cause change. MECHANICAL NUCLEAR ELECTRICAL CHEMICAL joules (J) A. Energy The ability to cause change internal motion of particles ENERGY motion of objects changes in the nucleus motion of electric charges bonding of atoms

  45. Which has the most KE? • Which has the least KE? 80 km/h 50 km/h 80 km/h A. Energy • Kinetic Energy (KE) • energy in the form of motion • depends on mass and velocity 80 km/h truck 50 km/h motorcycle

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