1 / 28

Energy Forms Notes

Energy Forms Notes. Physics is the study of matter & energy . We look for patterns to make predictions. This unit we will focus on ENERGY. What is energy?. “ Something ” that can change the condition of matter or the system

vricky
Download Presentation

Energy Forms Notes

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Energy Forms Notes Physics is the study of matter & energy. We look for patterns to make predictions. This unit we will focus on ENERGY.

  2. What is energy? • “Something” that can change the condition of matter or the system • Is only seen when it is being transformed (changed) from one form to another • The ability to do WORK • WORK is…when something is pushed/pulled and it moves or is changed

  3. We notice energy when we observe a CHANGE in the system • This means the INITIAL STATE is different from the FINAL STATE for our system • SYSTEM- the object(s) we are looking at (what you drew a sketch of at each lab station was the system for that station)

  4. INITIAL STATE -how the SYSTEM is at the beginning; a snapshot in time

  5. FINAL STATE • -how the SYSTEM is at the end, once a change has happened; also a snapshot in time

  6. For the remaining notes, set up this table in your lab book (on right side). It will probably require 2 pages.

  7. MECHANICAL ENERGY Energy of moving objects we can see or objects with energy stored for later motion DISCUSS: What 2 factors determine an object’s mechanical energy? Mass & velocity Is calculated by KM = ½ mv2 Lab Examples…

  8. RADIANT/LIGHT ENERGY • Energy from electrons moving from high to lower energy levels within the atom • Not all light is visible- waves such as radio, gamma and x-rays Falls under electromagnetism category Lab Examples…

  9. SOUND ENERGY • Energy of vibrating particles • Sound waves must have a medium to move through like air or water or walls • Ultrasounds & SONAR are sound waves Examples from lab…

  10. THERMAL ENERGY • Energy from moving atoms/molecules in an object • the faster they move, the more thermal energy • Related to HEAT & Temperature • Friction causes more thermal energy Lab Examples…

  11. Look for … a change in the temperature of an object or a friction force causing the thermal energy to increase.

  12. ELECTRIC/ELECTROMAGNETIC ENERGY • Energy of moving electrons (electricity) • Valence electrons(electrons furthest from the nucleus) move from one atom to the other • Also includes magnetism & falls under electromagnetism category Lab Examples…

  13. CHEMICAL ENERGY • Energy stored in the chemical bonds of substances • Is transformed when a chemical change takes place • Food, fuel, batteries all have chemical energy stored in them that we use Lab Examples…

  14. GRAVITATIONAL ENERGY • Energy stored in an object due to its height above a surface • DISCUSS: What 3 factors determine how much gravitational energy an object has? • Mass, height above surface, gravity • Is calculated by PG = m*g*h Lab Examples…

  15. The ball has the most gravitational energy up here The higher that an object is elevated,the greater the gravitational energy (note, we took multiple pictures of the ball as it fell to the ground in this diagram)

  16. If the ball is on the ground (or it’s as low as it can go), it has no gravitational energy.

  17. ELASTIC ENERGY • Energy stored in a stretched or compressed object that will go back to its original shape • Things that are springy have this energy stored in them when they are stretched or pressed • Springs, rubber bands, muscles all can store elastic energy Lab Examples…

  18. A Bouncy Ball stores elastic energy! So does a Water Balloon!

  19. Tennis Balls store elastic energy!

  20. Golf Balls store elastic energy! http://www.youtube.com/watch?NR=1&v=00I2uXDxbaE

  21. NUCLEAR ENERGY • Energy stored in the nucleus (center) of an atom • Is transformed into other energy types through fission (splitting the nucleus) or fusion (combining 2 nuclei) reactions Examples- the Sun, cancer treatment, MU Research Reactor, Calloway Power Plant

  22. NUCLEAR ENERGY All matter has this energy regardless if work is being done or not SO IS ALSO CALLED REST ENERGY because we don’t tap into it for most processes & practical purposes Is determined by Einstein’s famous equation E = mc2 c = speed of light = 3 x 108 m/s m = mass in kg

  23. KINETIC ENERGY Energy of motion & change Energy used to do work MOVING ENERGY

  24. POTENTIAL ENERGY STORED ENERGY Energy that is saved to do work later Objects that have potential energy have the potential to move or change

  25. 1. Label each form of energy as either kinetic or potential IN YOUR NOTES2. Highlight all the kinetic energies in one color and the potential energies in a different color IN YOUR NOTES

  26. How does a coal powerplant work http://www.citizen-times.com/videos/news/local/2015/05/22/27798035/ Watch the video from the above link List the general steps to go from coal to electricity. REMEMBER the parts of a generator. You may want to sketch a picture to go with your steps.

  27. END OF NOTES FOR TODAY

  28. ENERGY TRANSFORMATIONS CALLOWAY Nuclear Power Plant You turning on a lamp Write the energy transformation for the water balloon! Initial state the balloon above the ground.

More Related