12/22/09

Countdown Continues...

Honors Physics went over their Bernoulli’s equation and gas law problems and then got clobbered with a set of mixed review items. We’ll go over those in class tomorrow for our pre-vacation fun activity.

Physical Science B discussed calorimetry and worked a couple of calorimetry problems as a class. The lab that we will conduct when we return will allow you to use a rudimentary calorimeter and compare heat gained and heat lost by materials in a relatively closed system. Tomorrow, we’ll address your MCAS open response practice for our pre-vacation fun activity.

Physical Science E conducted a lab investigation into heat transfer. The first investigation allowed you to see that the amount of heat lost by one substance equals the amount of heat gained by a second substance. Since both substances were water, even the rates of gain and loss were identical. The second activity let you measure the energy stored in candle wax. By using the coke-can-calorimeter, you were able to use temperature changes in water to track how much energy was being delivered by a burning candle. By massing the candle before and after the test, you could report how many Joules of heat energy each gram of wax contained. We’ll go over this lab and discuss your MCAS specific heat practice items for our pre-vacation fun activity.

Physics F discussed yesterday’s lab investigation and the chapter review questions concerning fluid pressure. Time was then allowed for test corrections, which are due tomorrow. We will further examine fluids in motion, specifically Bernoulli’s Principle in class tomorrow as our pre-vacation fun activity.

Physics G was introduced to fluids in motion. The types of flow were compared and how flowing fluids observe conservation of energy and mass was discussed. We spent time discussing examples of Bernoulli’s Principle and will continue with this tomorrow as our pre-vacation fun activity.

Homework

Honors Physics A: Chapter Review #34, 38, 48, 50, 60
Physical Science B: Complete MCAS open response practice
Physical Science E: Complete lab write up and MCAS specific heat practice
Physics F: Complete test corrections
Physics G: Chapter Review items #20-22

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