Wednesday, December 22, 2010
Tues-Day 1
Physics- we further discussed electrostatic charging via conduction, and then via induction.
We noted the structure of the atom to see that only the outermost/valence electrons can move in a given material, the protons can NEVER move throughout a substance because they are all held together to neutrons in the nucleus of each atom via the STRONG FORCE of nature which, conveniently, is the strongest force in nature by far, yet it only acts over short distances i.e. the diameter of the NUCLEUS of an atom, which is about 10^-15 m (teeny tiny!).
We finished up our Power Lab, and then began a lab on energy loss in an inelastic collision.
By measuring the potential energy of a lacrosse ball at a given height, and equating that to the kinetic energy of the ball as it hits the ground, and then measuring the (lower) potential energy as the ball returns to a new lower height, we can calculate the net energy lost during the collision of the ball with the floor - we certainly hear that some of the potential energy was converted to sound energy as the ball hits the floor.
We noted the structure of the atom to see that only the outermost/valence electrons can move in a given material, the protons can NEVER move throughout a substance because they are all held together to neutrons in the nucleus of each atom via the STRONG FORCE of nature which, conveniently, is the strongest force in nature by far, yet it only acts over short distances i.e. the diameter of the NUCLEUS of an atom, which is about 10^-15 m (teeny tiny!).
We finished up our Power Lab, and then began a lab on energy loss in an inelastic collision.
By measuring the potential energy of a lacrosse ball at a given height, and equating that to the kinetic energy of the ball as it hits the ground, and then measuring the (lower) potential energy as the ball returns to a new lower height, we can calculate the net energy lost during the collision of the ball with the floor - we certainly hear that some of the potential energy was converted to sound energy as the ball hits the floor.
AP Chem - we focused on EXTREME dipole to extreme dipole intermolecular attractions, which are often called by the misnomer "hydrogen bonding".
We showed the high charge density requirement to have this type of IMFA; F, O, or N COVALENTLY bonded to an H WITHIN a molecule causes EXTREME dipole to extreme dipole intermolecular/ BETWEEN molecule attractions.
We began to discuss the various types of solids by bond type.# posted by C @ 12:55 PM 
