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Wednesday, February 4, 2009
Homework help section today, ISB 356
In the original posting about this, there was an error in the room number for Today's homework help section. Today's homework help section will be in ISB 356. (ISB is sort of above "Earth and Marine" on science hill.) It is at 2:00 PM (right after class) and will go for about 1 or 1 1/2 hours. You can ask any sort of question related to this class there. Whether you are somewhat lost or feeling really on top of things, i recommend it very highly.
Tuesday, February 3, 2009
Question about entropy
Here is a question about entropy:
Suppose your are at a party and someone hears that you have been taking "Conceptual Physics" and they say:
"I have always been interested in entropy. What can you tell me about entropy? Is it related to temperature or what? What would you say?"
Please feel encouraged to post questions, thoughts, comments, entropy-related quotes, poems or anything like that, here.
Suppose your are at a party and someone hears that you have been taking "Conceptual Physics" and they say:
"I have always been interested in entropy. What can you tell me about entropy? Is it related to temperature or what? What would you say?"
Please feel encouraged to post questions, thoughts, comments, entropy-related quotes, poems or anything like that, here.
Monday, February 2, 2009
Homework help sections this week
These week there will be two homework help sections:
one on
Wednesday at 2:00 PM in ISB 356,
(note correction of room number)
and the other at the usual time,
Thursday, 6:00 PM Nat.Sci 2, 101.
one on
Wednesday at 2:00 PM in ISB 356,
(note correction of room number)
and the other at the usual time,
Thursday, 6:00 PM Nat.Sci 2, 101.
Sunday, February 1, 2009
Reading for this week, , Feb 2
This week we will finish our coverage of temperature-related physics, possibly with a discussion the role of entropy in the evolution from solid to liquid to gas states of matter. Then we will start on waves and sound. The reading for that (waves and sound) would be chapter 19 up to page 372 and emphasizing the section on standing waves.
On Temperature
Here is something, excerpted and edited, from wikepedia regarding temperature:
In physics, temperature is a physical property of a system that underlies the common notions of hot and cold...
On the macroscopic scale, temperature is the unique physical property that determines the direction of heat flow between two objects placed in thermal contact. If no heat flow occurs, the two objects have the same temperature; otherwise heat flows from the hotter object to the colder object...
On the microscopic scale, temperature can be defined as the average energy in each degree of freedom in the particles in a system- because temperature is a statistical property, a system must contain a few particles for the question as to its temperature to make any sense. For a solid, this energy is found in the vibrations of its atoms about their equilibrium positions. In an ideal monatomic gas, energy is found in the translational motions of the particles; with molecular gases, vibrational and rotational motions also provide thermodynamic degrees of freedom.
The wikepedia site has some nice pictures of thermal motion.
http://en.wikipedia.org/wiki/Temperature
In physics, temperature is a physical property of a system that underlies the common notions of hot and cold...
On the macroscopic scale, temperature is the unique physical property that determines the direction of heat flow between two objects placed in thermal contact. If no heat flow occurs, the two objects have the same temperature; otherwise heat flows from the hotter object to the colder object...
On the microscopic scale, temperature can be defined as the average energy in each degree of freedom in the particles in a system- because temperature is a statistical property, a system must contain a few particles for the question as to its temperature to make any sense. For a solid, this energy is found in the vibrations of its atoms about their equilibrium positions. In an ideal monatomic gas, energy is found in the translational motions of the particles; with molecular gases, vibrational and rotational motions also provide thermodynamic degrees of freedom.
The wikepedia site has some nice pictures of thermal motion.
http://en.wikipedia.org/wiki/Temperature
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