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while you're waiting for the food to come
Great for Science Fair projects!

While You're Waiting for the Food to Come
by Eric Muller, Illustrated by Eldon Doty


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Make a wineglass whine.


- A wine glass or two

- Some water (maybe some wine)


The Recipe:

1) Moisten your finger by dipping it into some water.

2) Lightly touch the rim of the wineglass and slowly draw your finger around and around. You should start to hear a sound.

If no sound emerges, it might be because your fingertip is too slippery from body oils. To solve this problem, dip your finger in some wine instead of water. This helps cut the oil.

3) If you do get a sound, try filling the glass (or another glass) with differing amounts of water. See what other sounds you can get to emerge.

Food for Thought:

The glass rings for the same reason a violin makes a noise - stick and slip. To play, a violinist drags a bow across the strings. As the bow moves, it alternatively sticks and slips on the strings. This makes the strings vibrate, which in-turn makes the air vibrate and this is what we hear as sound.

On the wineglass, your finger is like a bow and the glass is like a string. Your finger sticks and slips as it is dragged around the glass's rim.

Copyright 1996 Eric Muller
While You're Waiting for the Food to Come"

Original copyright of While You're Waiting for the Food to Come 1995 Eric Muller

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