I did really good
avoiding Girl Scout Cookies, until we bought a box of Trefoils and a box of
Thin Mints outside a Kroger in Louisville.
The little girl was an efficient and cute salesperson. I decided to have a few cookies with my
coffee earlier this morning. It ended with a Hunter S. Thompson style binge.
I lost time and now find myself surrounded by empty wrappers and cookie
crumbs. I’m not proud of this. All I can do at this point is clean my face
and the living room floor, rehydrate, force down some Activia and never speak
of this again. On a positive note, I’ve
saved myself from thinking about the cookies by consuming them all. I always try to be a glass half-full type of
person.
 |
| Source |
Straw Oboe
What You Need
Drinking Straw
Scissors
What You Do
Flatten one end of the
soda straw by sticking the end in your mouth, biting down with your teeth, and
pulling it out. Do this several times to
make a flexible flat-ended straw. Cut
equal pieces of straw from each side of the flat region so that the straw has
two lips at the end.
Put the straw in your
mouth, and bite down on it gently with your front teeth just beyond the lips of
the straw. Experiment with blowing hard
and softly while biting down with different amounts of pressure until you make
the straw sing.
What is Going On?
When you blow, a pulse
of compressed air flows down the straw.
The pulse travels down the straw at Mach 1, the speed of sound, and
bounces off the distant open end. When
the sound bounces off the open end, the compressed air changes into a
low-pressure expansion. When the
expanded air reaches the lips of the straw, they are forced closed – then
bounce open to admit more air. The sound
bounces back and forth inside the straw and the lips of the straw open and
close to create sound.
No comments:
Post a Comment