 |
Journal of scientists, physicists, mathematicians, engineers, inventors, nature, biology, technology, animal kingdoms, and science projects.
Home
ANC News
Animals
Biographies
Biology
Chemistry
Environment
Free Updates
General Science
Headlines
Human Body
Inventors
Kids to 12
Physics
Questions&
Answers
Quantum
Resources
Projects &
Experiments
Science@NASA
Submission
Guideline
Tables
Technology
US Geological Survey
If you have questions concerning this website, contact webmaster@light-science.com
| Carl Sagan's COSMOS is one of the most influential science programs ever made.
Q. Does the moon have a dark side?
A. The moon does have a far side which is impossible to see from the earth, but it doesn't mean that it's always dark. Each side of the moon is dark for no longer than 15 days at a time.
Q. Where does sound come from?
A. The air is always filled with sound waves. All things give off vibrations, but some have a low frequency which most cannot hear. The reason: it may take 3 minutes to make a single vibration. They may be caused by earthquakes and storms.
Did You Know?
The microwave was invented after a researcher walked by a radar tube and a chocolate bar melted in his pocket.
Coke-a-Cola was originally green.
Rubberbands last longer when refrigerated.
|
|
|
Static Electricity Stocking Trick
For this project you need to document with photographs how the stocking trick is performed. Your display may include a hook from a piece of hanger that suspends a charged stocking. It will remain filled for several hours until the charge begins to leak out. Simply refresh your stocking by rubbing it against a wall.
All substances carry a balanced quantity of protons (positive charged electrical particles) and electrons. As you rub some objects against other objects, electrons will move into either object from the other: As one of 2 objects are rubbed together, one becomes more negatively charged than positively charged. As in magnetism, negative and positive attract, but two of the same charge will repel. You will rub the stocking with the polyethylene to transfer negative charges into the stocking: the walls of the stocking are negatively charged, push away from each other, and fill the stocking out.
MATERIALS NEEDED:
1. Nylon stocking
2. Dry-cleaning bag that is crumpled (polyethylene plastic bag)
FIRST, take the toe of the nylon stocking and hold it against a wall. Use the crumpled bag to rub the stocking with firm pressure in long downward strokes.
NEXT, remove the stocking (gently!) from the wall and attempt to prevent it from touching any other surfaces or your clothes.
THEN, make an observation as to what happens to the stocking: As the walls of the stocking repel each other, the stocking will fill out causing it to look as if a leg were in it.
Source:
1. Vecchione, Glen. 100 First-Prize Make-It-Yourself Science Fair Projects. Sterling Publishing Company, Inc.: NY 1999
|
|
|
Please visit our
affiliate partners that
keeps our site up.
|
|
