Welcome Back Scientists! Tuesday, January 26, 2016 Objective: Energy Conversions; I will classify the forms of energy and energy transfers to further my understanding of energy. Homework: Vocab Quiz on Thursday, Jan 28th Agenda: 1.#collegetourtuesday 2.New Vocabulary 3.Energy Conversion Notes 4.Energy Transfer Pictures
#COLLEGETOURTUESDAY
University of Oklahoma Founded in 1890 Motto: For the citizens and for the state. 30,303 students Colors: Crimson & Cream Mascot: Sooners
University of Oklahoma Founded in 1890 Motto: For the citizens and for the state. 30,303 students Colors: Crimson & Cream Mascot: Sooners
University of Oklahoma Founded in 1890 Motto: For the citizens and for the state. 30,303 students Colors: Crimson & Cream Mascot: Sooners
University of Oklahoma Founded in 1890 Motto: For the citizens and for the state. 30,303 students Colors: Crimson & Cream Mascot: Sooners
University of Oklahoma Founded in 1890 Motto: For the citizens and for the state. 30,303 students Colors: Crimson & Cream Mascot: Sooners
University of Oklahoma Founded in 1890 Motto: For the citizens and for the state. 30,303 students Colors: Crimson & Cream Mascot: Sooners
University of Oklahoma Founded in 1890 Motto: For the citizens and for the state. 30,303 students Colors: Crimson & Cream Mascot: Sooners
University of Oklahoma Popular Majors: Biology Business/Marketing Education Engineering Health Journalism Tuition & Fees: $9,495/year (in-state), $22,269/year (out-of-state)
University of Oklahoma
New Vocabulary ELECTROMAGNETIC ENERGY: energy of light and other forms of radiation NUCLEAR ENERGY: potential energy stored in the nucleus and released by the splitting of an atom
ENERGY CONVERSION NOTES
Main Principal # 5 Energy Transfer One of the most important concepts is: All types and forms of energy can be changed into any other type or form. Example: Potential changes into Kinetic
How “Elasta-Girl” shows Energy transfer: PotentialKinetic As she gets pulled back the bungee cords gain more elastic potential energy When she is released, all that Elastic Potential changes into Kinetic as the cords snap back Wait a minute! Why did we get A change in the graphs at the end?
Remember the roller coaster? PotentialKinetic The Gravitational Potential Energy of the roller coaster transfers into Kinetic Energy when it rolls down the hill! Watch the graphs while the coaster falls!
What about the rocket? PotentialKinetic Watch the graphs while the rocket takes off:
But it isn’t as simple as that! Chemical Potential Kinetic There is more energy involved here than just Potential and Kinetic: Gravitational Potential Heat Think: so why are the heights of each graph different? The total amount of the Potential energy we started with equals the amount of energy we ended up with!
Energy Form Transfer: All energy can be transferred from one form to another. For example: Mechanical Heat Ex: “Burrell’s Energy Spheres of FUN!”
Main Concept 5: Any Form of energy can change into pretty much any other form of energy including a change into more than one at a time! Nuclear Electromagnetic Heat Chemical Heat Mechanical Heat Chemical Heat Electric Think: Did you notice how many times “heat energy” showed up? What might explain this? All energy changes also make heat! This heat is usually lost to space..
Three main facts of energy transfer: Main Concept 6: There is only so much total energy in the universe. All forms of energy are interchangeable “ Law of Conservation of Energy ” Says: Energy cannot be created or destroyed it is always conserved somewhere/somehow. Energy can only be moved or changed into something else. (changed from one type or form into another)
Conservation of Energy: Ex: “The Pendulum of Fear!” The pendulum will NOT gain or lose energy when it swings! It only swings with as much energy as it is given!
Application of Energy Conservation: But we realize that pendulums WILL eventually slow down and stop swinging! This seems to contradict the Law of C.E. BUT IT DOESN’T! Can you explain why the pendulum does slow down? (hint: think about forces!) Friction from air resistance Gravity is constantly pulling down Both forces act to slow down and eventually stop the pendulum.
We can draw a “flow chart” to show energy changes: Moving water turns a “generator” to make electricity that comes to our house and we use for lots of things Gravitational Potential MechanicalElectricLight and Heat
ENERGY TRANSFER PICTURES
ENERGY TRANSFER Energy transfers between different forms of energy. Energy cannot be created nor destroyed, but it can be changed fro one form into another. No energy transfer is 100% efficient Energy is most often lost in the forms of heat or sound
ENERGY TRANSFER PICTURES Read your energy transfer scenario. Draw a picture to represent the scenario. Label each energy type. This energy transfer involves _________________ energy converting to _____________ energy. Cite any evidence that supports that energy transfer is not 100% efficient. Evidence that supports energy loss during this transfer is ________________.