Fluids don't have a particular shape (the way a brick does). They
acquire the shape of their container by flowing.
Let's study how fluids flow, so that we will be better able
to understand electrical current.
Here are some things to think about and do as we start the
unit on fluids.
Each of the following questions requires that you actually do something
with a fluid to investigate the question posed, not just talk about
what might happen.
Please do the following brief investigations.
A fundamental characterization of a flowing fluid is the flow rate,
which is the volume of liquid that is transmitted in a unit of time. We could
determine the flow rate of the drinking fountain by measuring the amount of liquid
it emits in ten seconds. Or we could measure how long it takes to fill a measuring
cup of known volume, and then calculating
Flow rate = volume produced / time to produce it
Using your own method, measure the flow rate of the water fountain. Compare it
to the flow rate of another faucet turned on full, and just barely turned on (so that
there is a tiny stream of water being produced).
Let's make a siphon. To do this, we need a container mostly full of water,
and a piece of tubing from the kit. Fill
the tubing with water somehow -- immersing it in the container, for example. Then
block one end with a finger, and place the tube so that one end is under water in
the container, and the other is outside the container, and no higher than the other end.
Fill the tube
Pull it out, with the end blocked
Unblock the tube
Now unblock the tube --- and look for a mop! Practice doing this until you are
sure you can make it happen every time.
your journal about what you learned, and any questions or problems you
encountered. We will ask to see your journals at the end of the workshop.
Keeping records along the way is part of the workshop assessment, as well
as an important part of the learning process.
Check the box when you are done: