Monday, November 1, 2010
Mon-Day 1
Physics - continued our Forces 3 and 4 packet questions. THERE IS ONE CORRECTION! In Forces 4, question 1, we WERE solving for the coefficient of STATIC friction BECAUSE the object STARTED to accelerate from REST- ALWAYS associate any acceleration from REST with the coefficient of STATIC friction. That note was corrected and posted on Blackboard.
In each problem, ALL of the required information is given so that you can set up the diagram, and write the SAME equations each time. The only difference will be the unknown variable and/or whether the object is accelerating or not.
FOR HW to be checked on Wednesday; do QUESTION 2 on Forces 4. Also do QUESTIONS 1 THROUGH 4 on Forces 5 (ALL of those questions are review questions; check your notes, if you get stuck).
To help you study for Thursday and Friday's unit exam on Dynamics, I will post the answers (with detailed work shown) to MOST of the multiple choice questions at the end of our unit packet. Do those questions and then check your work vs. mine.
AP Chem- check Blackboard for HW tomorrow.
we discussed Planck's explanation of the blackbody radiation data curve in which he avoided the "ultraviolet catastrophe"/failure of the classical physics theories by hypothesizing that energy exists NOT ONLY as waves but also as discrete, indivisible packets of energy i.e. quanta of energy.
He explained the data by establishing the relationship between the energy of one quantum and the FREQUENCY of its energy when measured as a wave. His hypothesis was later supported/confirmed by Einstein.
We did some quantum calculations- determining the energy of a quantum/photon from either the frequency or the wavelength of a given type of light. We then magnified that to the energy per MOL of photons simply by multiplying by Avogadro's number of photons per mol.
In each problem, ALL of the required information is given so that you can set up the diagram, and write the SAME equations each time. The only difference will be the unknown variable and/or whether the object is accelerating or not.
FOR HW to be checked on Wednesday; do QUESTION 2 on Forces 4. Also do QUESTIONS 1 THROUGH 4 on Forces 5 (ALL of those questions are review questions; check your notes, if you get stuck).
To help you study for Thursday and Friday's unit exam on Dynamics, I will post the answers (with detailed work shown) to MOST of the multiple choice questions at the end of our unit packet. Do those questions and then check your work vs. mine.
we discussed Planck's explanation of the blackbody radiation data curve in which he avoided the "ultraviolet catastrophe"/failure of the classical physics theories by hypothesizing that energy exists NOT ONLY as waves but also as discrete, indivisible packets of energy i.e. quanta of energy.
He explained the data by establishing the relationship between the energy of one quantum and the FREQUENCY of its energy when measured as a wave. His hypothesis was later supported/confirmed by Einstein.
We did some quantum calculations- determining the energy of a quantum/photon from either the frequency or the wavelength of a given type of light. We then magnified that to the energy per MOL of photons simply by multiplying by Avogadro's number of photons per mol.
# posted by C @ 9:01 AM 
