Wednesday, February 9, 2011
Wednes-Day 2
Physics - continued with more parallel circuit problems; these problems involved switches, and calculations of individual circuit loop currents, as well as equivalent resistance and total current.
We continue to stress that each loop has the same potential difference as the total voltage of the battery; we also emphasize that each loop is completely independent of the others, and that Ohm's Law applies to each individual loop, as well as to the whole circuit, as long as the appropriate SUBSCRIPTS are used.
Do not use just generic V, I , and R in these calculations or you will make an error.
AP Chem - took the unit kinetics exam. I am already appalled at the number of students who showed NO WORK in trying to deduce the rate law from the data table! Every single problem that we did in class emphasized that you had to DIVIDE one experiment's rate law data by another, and then repeat the process for the other exponent. You CANNOT do these problems in your head on the AP exam; you must show detailed work/thought process on EVERY written response answer.
We continue to stress that each loop has the same potential difference as the total voltage of the battery; we also emphasize that each loop is completely independent of the others, and that Ohm's Law applies to each individual loop, as well as to the whole circuit, as long as the appropriate SUBSCRIPTS are used.
Do not use just generic V, I , and R in these calculations or you will make an error.
AP Chem - took the unit kinetics exam. I am already appalled at the number of students who showed NO WORK in trying to deduce the rate law from the data table! Every single problem that we did in class emphasized that you had to DIVIDE one experiment's rate law data by another, and then repeat the process for the other exponent. You CANNOT do these problems in your head on the AP exam; you must show detailed work/thought process on EVERY written response answer.
# posted by C @ 2:31 PM 
