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[Fhsst-physics] Heat and properties of matter chapter
[Fhsst-physics] Heat and properties of matter chapter
Mon, 10 Oct 2005 22:11:31 -0700
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Hi Gerald (and everyone)
Sorry about the delay (again!). Everything in this email is my opinion
and I really welcome comments and discussion from everyone. The pdf file
of the chapter is attached for reference for other people.
I spent some time looking at the heat and properties of matter chapter
as a whole. I have a suggested restructuring and some comments.
I think it needs a reshuffle (all my fault for not sorting it out
earlier). I have a proposal and I'd appreciate your and anyone else's
input on the proposed structure. I do have comments on the some of the
content too which I will put after the restructuring.
You didn't agree to finishing off the whole chapter so I don't mind
doing the restructuring if you send me the .tex file as you have the
latest one. I can also implement my comments for the sections you aren't
In this structure I hope to start with simple everyday things and try to
slowly increase the maths difficulty and the level of abstraction.
Proposed structure - basically just need to rearrange what is there:
* Short description of what we mean we talk about matter - include
solids, liquids and gasses
* mention that all matter consists of particles but don't go into details
(Reason: So we mentioned all the phases we'll discuss later
and that they are all made up of particles of some sort)
* measure the average energy of the particles the matter is made up of
[pg 35+ of current chapter]
* temperature scales
(R: Now we have introduced the initial idea that temperature has
to do with the motion of the particles, helps with explainging
why temperature leads to phase changes etc.)
* define and explain density
(R: Now we have introduced the two simplest concepts of this
chapter and they relate to very simple everyday things)
Phases of matter:
(R: Lets introduce phases phenomonologically)
talk about rigid structures of particles
(R: Now we have discussed all the phases very simply in terms
of how the particles within them are structured but without
(Now we go through the properties of phases in more detail)
* Kinetic theory of gasses
(R: All the gasses stuff they can handle - try to group things
in levels of complexity, leave out mean free path till later
- some new maths skills required)
(R: We introduced the concept of pressure in gasses above)
* Expansion/contraction with change in temperature
* Stress and strain
(R: These are not much more complicated mathematically and
require similar mathematical skills as above)
* Temperature of an isolated body
* Thermal equilibrium
* Internal energy
* Specific heat
* Latent heat
Phases Diagrams II
* Gasses - mean free path
* Fluid Mechanics
* Solids - Bragg diffraction
What do you think of it?
Here are some specific comments I made as I read through the sections:
- we must be clear that when we say a given volume we can also mean a
fix volume. I am worried about how weaker students will interpret the
word given - we must use it as its basic physics terminology but it
means somehting quite specific to us.
I would add "i.e. mass per unit volume"
I would change olive oil to just oil
I would tabulate the categories of solids - just to break up the flow
of constant text.
We should try to find a pic describing the amorphous structure
I think we should expand the Bragg explanation a bit more but its nice
thing to have in.
We also need to introduce Angstroms somewhere - i don't htink they occur
anywhere else in the book
In the sentence "One way in which ... tensile testing." insert "... [ a
process called] tensile testing."
The B-Bs stuff is a little lost on me. I am not sure what they are?
formula 1.6 is wrong - needs an "h" added. We should also add an
explicit dotted line along the tops of the fluid to make it super
explicit that the depths of fluid are the same and there the pressure is.
I think we need another worked example before example 5
I think the best way to start the bouyant force section is to talk about
what it feels like when you get in a river or pool - you feel lighter on
your feet - why is this? Lets investigate it ...
At the end of the bouyant force section we should point out that if no
water can get below the object then there is no force - a flat sheet on
the bottom of a pool feels no bouyant force. I have seen quite a few
university students get this wrong.
We should make the example activity at the bottom of the page stand out
more - perhaps with a couple of pictures
We should eventually have lots of activities for students to do - maybe
in an environemtn of their own.
pg 16 - 20:
We have to break this up more and make it more teenager friendly.
I am pretty happy with the gasses stuff up so I think we need to see how
the restructuring looks and how the difficulty and complexity increaes.
We will have covered more than everything they need to know to start
first year university.
Hope you all made it to the end :)
"Life is but a seg-fault away ...
Life received signal SIGSEGV, Segmentation fault.
0x42074d40 in calloc () from /lib/i686/liblife.so.6"
Description: Adobe PDF document
- [Fhsst-physics] Heat and properties of matter chapter,
Mark Horner <=