Tuesday, January 4, 2011
Tues-Day 1
Physics- we got into the electrostatics unit today, calculating the number of elementary charges in excess, from a given net charge on an object.
We also saw that when two or more charged objects are in contact, that the electrons are conducted until all of the objects have the same NET charge; this is calculated by taking the AVERAGE of the initial charges from the spheres.
We then introduced the most fundamental and important law in all of chemistry (it explains ALL of chemistry!) and physics: Coulomb's Law.
Coulomb was able to measure the Force of Electrostatic Repulsion (like charges) or Attraction (opposite charges) between charged objects.
We saw that this force is proportional to the PRODUCT of the charges (in Coulomb's);
the force also has an INVERSE SQUARED relation to the DISTANCE between the charges.
To get the law/equation, we looked at the electrostatic constant , k, and its units; k is on the reference tables.
We covered some questions from our mechanical energy / lacrosse ball lab.
We also saw that when two or more charged objects are in contact, that the electrons are conducted until all of the objects have the same NET charge; this is calculated by taking the AVERAGE of the initial charges from the spheres.
We then introduced the most fundamental and important law in all of chemistry (it explains ALL of chemistry!) and physics: Coulomb's Law.
Coulomb was able to measure the Force of Electrostatic Repulsion (like charges) or Attraction (opposite charges) between charged objects.
We saw that this force is proportional to the PRODUCT of the charges (in Coulomb's);
the force also has an INVERSE SQUARED relation to the DISTANCE between the charges.
To get the law/equation, we looked at the electrostatic constant , k, and its units; k is on the reference tables.
We covered some questions from our mechanical energy / lacrosse ball lab.
AP Chem - covered the remaining types of molecular solids, and their physical properties that result from their degree and type of IMFA.
We then looked at phase diagrams, discussing the important regions and phase changes that occur at various temperatures and pressures.# posted by C @ 7:40 PM 
