1/17

Objective:  SWBAT understand how charges and their electrical fields interact.

Warm Up:  Turn in your Ch 18 and Ch 19 Outlines.
Who was Coulomb and why is there a law named after him?

1/12

Day day of the semester!!!  The grade for the test you took yesterday will go on 3rd Quarter.

Objective:  SWBAT experiementally explore changes in phase by making ice cream.

Warm Up:  Read the icecream recipe.  Why is salt added to the ice that is used to freeze the icecream?

1/10

Objective:  SWBAT review for tomorrow's test on Heat and Thermodynamics.

Warm Up:  An automobile engine has an efficiency of 22% and produces 2510 J of work.  How much heat is rejected by the engine?

1/9

Objective:  SWBAT solve problems related to the work done by thermodynamic processes.

Warm Up:  A system gains 1500 J of heat from its surrounding and 2200 J of work is done by the system on the surroundings.  Determine the change in the internal energy of the system.

1/5

Objective:  SWBAT determine the efficiency of a heat engine.

Warm Up:  Yesterday was a commuters nightmare in DC because the cold weather cracked some of the rails on one of the metrorail lines.  Calculate the thermal contraction of a 20 m long steel metrorail line (whose coefficient of thermal expansion is 12 x 10^6) if the temperature drops from 32 oF to 12 oF.

1/4

Objective:  SWBAT understand how thermodynamic processes and work done on/by a gas affect the gases internal energy.

Warm Up:  Air is primarily made up of nitrogen and oxygen gas.  Assume that each behaves as an ideal gas. Determine the rms speed of the nitrogen and oxygen molecules when the temperature of the air is 293 K.

1/3

Happy 2012!!

Objective:  SWBAT understand phase diagrams.

Warm Up:  The Rosser Reeves ruby is 138 carats and is composed of mainly aluminum oxide.  One carat is equivalent to a mass of 0,2 g.  Determine the number of aluminum oxide molecules in the ruby.