Week of October 26, 2015

Welcome to second quarter! Congratulations on completing 1/4 of your physics course!!!

This Week in AP Physics
Away we go with ENERGY! As with the last unit, this is one of the foundation topics in physics, so stay alert! We will start with some phenomenally-presented notes followed by homework 1 as announced. We will also do a lab on the work-energy theorem in which we’ll examine the work done by a variable force. This will be a formal lab report that will be due one week after we finish the experiment. (Remember that the hardcopy will be due at the start of class on the due date; an upload  is due to TurnItIn.com by 3:00 of that day. Remember to write using Google Drive and share your document with me at alhsgb@gmail.com… Note that I do not use that for email correspondence.)

This Week in Physics
1st period: Your unit 2 test is Monday, and on Tuesday we’ll have some fun with a projectile experiment. On Wednesday we’ll begin unit 3 on force and Newton’s laws. You will have no podcasts due this week.
3rd period: On Monday we will finish practicing the math for projectile problems and will begin assignment 3, which we will finish on Tuesday or Wednesday. Following this we’ll discuss upwardly-launched projectiles and satellites and will do assignment 4. Ideally we will take the unit test on Friday.
6th period: On Monday we will do assignment 4 and will review for our unit 2 test, which we’ll take on Tuesday. On Wednesday we’ll have some fun with a projectile experiment. On Wednesday we’ll begin unit 3 on force and Newton’s laws. You will have no podcasts due this week.

Cool Science of the Week
Fall is here, and it’s getting to be super pretty outside with all of the fall leaves. Did you know that our fall colors can be seen from space? Pretty nifty! You may remember from biology class why leaves change colors in the fall, but just in case you’ve forgotten, I’ll tell you. Plants look green in the summer because chlorophyll is the dominant pigment, and in the summer when chlorophyll degrades, the leaves make new chlorophyll. In the fall, however, with decreased exposure to sunlight, the plant stops making new chlorophyll. When the dominant green pigment is gone, we begin to see other pigments that were there all along. These pigments are yellow, orange, red, and purple. I think it’s really cool that the fall colors are present in the leaves all summer long, but we don’t see them because the chlorophyll dominates. Finally in the fall they get to show off. 🙂Fall Colors Arriving
Fall color as seen from space last fall, courtesy of NASA