2/23 Armour

*This is awkward because it was actually my day because Jeff and I switched, so I am going to post my version of the blog for february 23rd also.

Today in physics, we learned more about electrostatic subjects. However, first we turned in our homework from the night before (reading guide). Then we took notes about coulomb’s law, superposition principle, and conservation of charge. The notes are below. Mr. Ebersole handed out the practice problems sheet and we completed that together as a class. Then we worked on the pair check, if one finished then you got to work on your homework. It was a very exciting day in physics.
Electrostatic Notes
1. Coulomb’s law
a. Consider two static point charges
b. Each charge experiences a force along a line connection the two charges
c. The magnitude of the force is given by:
i. F=k|q1||q2|/r2
d. Where k = 8.99*10^9 n*m2/c2
e. q1 and q2 are the magnitudes of the two charges
f. r is the distance between the charges
2. Superposition Principle
a. We can add the electric forces as vectors
b. Opposites attract
c. Like charges repel
3. Conductors- readily conduct electric charge from one point to another i.e. metals
4. Insulators- charge placed on one part of the surface remains localized i.e. wood, rubber, and glass
5. Conservation of Charge
a. Although charge moves from place to place, net charge is never created or destroyed
6. Basic Units of Charge
a. Electrons have a mass of 9.1*10^-31kg and charge of -1.6*10^-19
b. Protons have a mass of 1.67*10^-27 and a charge of 1.6*10^-19
Q.O.D.
What does superposition mean?
Superposition means we can add the electric forces as if they are vectors.