Winding Up Magnetism

Honors Physics discussed historical models of the atom (a review for most) and used those models to highlight how quantum physics promoted a more complex, yet more accurate atomic model. We moved from Thomson to Rutherford to Bohr and broke off during our discussion of matter waves, which helps to further explain aspects of Bohr’s model and opened the door to new ways of looking at the atom, energy and matter as a whole. Tomorrow, we continue on with this discussion and will likely step into nuclear physics.

Honors Physical Science B and E completed their discussion of magnetism with an overview of how electromagnetic waves are formed and self-propagate through empty space. Then, we reviewed over the reasons electricity is delivered to customers at high voltages (reducing power dissipation in the lines) and how transformers work to bring the voltage into the range of the average consumer. We examined the structure of a basic transformer and how the winding ratio determined how much the voltage was stepped down or stepped up. Tomorrow, B Block will spend time reviewing for Thursday’s exam. E Block will conduct their lab investigation for this unit, centering on permanent and electromagnets and will have time in class to review exam material. Several folks have mentioned stopping by after school tomorrow for a review. To maximize the effectiveness, look over the material and come with specific problem areas for us to work on. This should eliminate the last minute panic when you realize that some area that you forgot about was an area that you had trouble with and the exam begins in 5 minutes.

Physics F viewed the Magnetic Storm DVD as the culminating activity in this unit. Tomorrow, we take time to review the material from the two chapters on Thursday’s exam. Make sure to have your discussion questions ready to go for tomorrow, also. Physics G progressed through electromagnetic induction, starting with Lenz’s Law and ending with the basic structure of motors. We’ll complete the unit material tomorrow and take time to highlight relevant exam material.

For all seniors – progress grades were submitted before many of you decided to toss missing work/ test corrections/overdue labs in my direction. Although these scores will be reflected in your final quarter grade, they won’t be represented on your progress grade.

Homework

Honors Physics A: None
Physical Science B: None (but make sure you have completed the 17.3 Section Review)
Physical Science E: Read lab protocol sheet
Physics F: Complete Magnetic Storm discussion questions
Physics G: None