experiments_with_your_computer.pdf

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Contents
3 About this book
Computers in experiments and research
6 Using the programs in this book
7 Coin-tossing program
8 Bouncing ball
10 Pulse rate experiments
14 Ethel's journey
20 About economic models
21 Running an airline
24 Experiments with sensors
32 Storing information
37 Looking at results
40 Likely or unlikely?
42 Program conversions
46 Graphics routines
48 Index
About this book
This book contains lots of fun programs
which enable you to use your computer
to do experiments and analyze
information. The programs are simple
examples of how scientists, economists
and other researchers use computers.
They are designed for home computers
and will run on the Commodore 64, VIC
20, TRS-80 Colour Computer (32K),
Apple II, BBC (B), Electron and Spectrum. *
On page 8 there is a program which models
a ball bouncing. You can experiment with it
and see what would happen if you bounced
a ball on another planet.
On pages 24-31 there are step-by-step
instructions for building temperature
and light sensors for your computer. *
Sensors are electronic devices which
measure things like temperature or
light and convert the measurements
into electrical signals. Using sensors a
computer can take readings directly
from an experiment and tell you what is
happening.
Some of the programs are themselves
experiments. You can alter different
factors in the program and see what
happens. These programs are called
models. They enable you to test
theories and make predictions.
Other programs are designed to deal
with results you collect from
experiments or surveys. They help you
analyze the data and also store and
display it in useful ways.
You can find out how to type in and use
the programs on page 6. On pages 46-47
there is a graphics routine which you
can add to several of the programs.
*The sensors on pages 24-31 only work with computers which have an "analogue" port, that is, the
Commodore 64, VIC 20, TRS-80 and BBC.

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