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Turnbull China Bikeride
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Turnbull China Bikeride - Disc 1.iso
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EDUCATION
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SCIDEMOP.SPK
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1997-10-30
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43 lines
Read Me file for Science Demo by O. Roucoux
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4-stroke engine
~~~~~~~~~~~~~~~
There are more realistic diagrams of the 4-stroke engine, but this has
the adavantage of working as slowly as one wants. Each stroke is also
explained on the screen with their names.
To make the engine run without interruption, hold the space bar for a
few seconds.
Another advantage is that the drawing is simple enough to be draw by the pupils in their books.
With recent computers (ArcPC) the piston could go up too fast in the
cylinder. As it is it is satisfactory for the A3000.
To change the speed of the movement go into the listing in Basic and
change, in DEF PROCup, the line 850 FOR T=1 TO 1000:NEXT T to
FOR T=1 TO 100000:NEXT T. The larger the high number the slower the
movement. Obviously you have to do the same for in DEF PROCdown line
600. With older computers such as BBC B or Master the large figure
needs to be decreased.
BOYLES LAW
~~~~~~~~~~
!Boyle . A modelling of the real experiment. to demontrate that
Pressure x Volume = constant.
Increase the pressure by pressing P (pump up)and decrease it by
pressing D (deflate). The pressure may be set from 1 to 14 atmospheres.
The volume varies from 700 units down to 50.
The advantage of this programme is this : the range of real practical
experiments is extremely narrow. The pressure can hardly reach 3
atmospheres in hand pumps, so the graph drawn does not allow a
conclusion. Using the readings on the screen as a model, the range is
extended to 14 athmospheres, and the law deduced.
NOTE
~~~~
These 2 programmes are possibly completely obsolete with the present
day style of teaching, but they were still extremely useful when I
retired from GCSE science teaching in 1992. I would be happy to get
remarks from teachers who have still time, between their new
administrative commitments, to try to improve their teaching methods.
Omer Roucoux e-mail address : roucouxo@argonet.co.uk