These Webpages are no longer maintained. We are keeping the pages here to preserve some of the early years of ProjectDragonfly, to honor the students who created the interactives in the early days of the Web, and because many of the activities are fun and people are still using them. For current Project Dragonfly work, go to:www.ProjectDragonfly.org
Both of you decide that you can use the battery as the power, the coat
hanger as an antenna, and the transistor radio to create the waves,
although the radio is partially broken. By using a connecting cable to
your computer the transistor radio displays the constant sound wave that
it being emitted from the radio onto the screen.
Which do you adjust?
Martha suggests that in order for the ship to hear your signal, the sound
must be quick enough for any ship's intruments to pick
need to adjust the frequency or the
amplitude of the
Increase the frequency
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