Assignment:
We presented our problems today and turned them in. We will work on these thermodynamic cycles to turn them in finally on Friday. Assignment: Ch 15 P: 7, 8, 10, 11
We developed a few useful relations and began applying them to the various thermodynamic cycles we will study. The point is to figure out how we can use energy to get things done! Assignment: Ch 15 P: 1, 2, 4, 5
Isotherms are curves that show the inverse proportion that exists between P and V in a gas that is held at a constant temperature. The isotherms for one sample of gas at five different temperatures are shown below. By the way, you should be able to find the temperature of that sample of gas for each ot the five isotherms. Can you do it? We began out study of thermodynamics by seeing that we could warm up wood by hitting it with a hammer and by setting a bit of cotton on fire just by compressing the air surrounding it. In addition to this, we learned about four different kinds of processes to which we can subject gas confined to a cylinder with a movable piston:
We answered questions today in anticipation of tomorrow's Celebration of Knowledge!
We discussed again what must go on for particles to become bound together as must happen for water molecules as they become droplets. We also discussed how misters work to cool us off during the summer at outdoor restaurants. Today was a "half-day." After finishing our presentation of thermal expansion problems, we turned them in and considered two questions related to Chapter 14:
Celebration of Knowledge on Thursday! After a brief quiz, we began to present our problem solutions today and will finish them tomorrow. Our test on Chapter 13 Sections 1-4 and Chapter 14 Sections 1-8 will be on Thursday, Oct 25.
Thermal expansion was introduced today, and we saw a stripped down thermostat, a strip of metal that bent when heated and closed an electric circuit, turning on a light bulb. Here's a helpful video: Assignment:
We turned in our assignments today. Transfers of energy by heating in warming and cooling (which involve "thermal energy") and in phase changes (which involve potential energy) should be well understood. You should be able to describe radiation, conduction, and convection and to give examples of each.
Tomorrow should be swell. Assignment:
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Physics IIMr. Swackhamer Archives
May 2019
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