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## Homework Statement

If you blow air over the top of a fairly large drinking straw you can hear a fundamental frequency due to a standing wave being set up in the straw. Match the following actions with their consequent results:

1. While blowing, you cover the bottom of the straw with your fingertip.

2. While blowing you cut the straw in half with a pair of scissors.

3. While blowing you cut a third of the straw off with a pair of scissors.

4. While blowing you glue an extension of half the length of the original straw to the original straw.

A. The fundamental frequency increases. It is now 3/2 the original fundamental frequency.

B. The fundamental frequency decreases. It is now half of the original fundamental frequency.

C. The fundamental frequency increases. It is now twice the original fundamental frequency.

D. The fundamental frequency decreases. It is now 2/3 of the original fundamental frequency.

## Homework Equations

## The Attempt at a Solution

I just got 2-c. I don't know about the rest, please help.