How Sounds Travels Through a String Telephone Purpose: To produce a string telephone Materials pencil two 5-ounce (150-mL) paper cups 20 feet (6m) of #10 crochet string 2 small metal paper clips helper Procedure 1. Use the pencil to make a small hole in the bottom of one of the cups. 2. Thread the end […]
Sound: Wind Chimes
Question: How do wind chimes make music? Answer: Wind chimes are made of objects that make interesting sounds when the wind causes them to bump into each other. Sounds are made when things vibrate, which means to move back and forth. The sound of wind chimes is not that the hanging objects swing back and […]
Zero Gravity-Weightless?
Can passengers in NASA’s Vomit Comet Float Around in a state of weightlessness? Yes, passengers in the plane can float during the ride but only for short periods lasting only about 30 seconds. Only in orbiting space craft do astronauts continuously float. In the KC-135, commonly called the Vomit Comet for obvious reasons, there are […]
Sound: Blowing a Raspberry
Blowing a Raspberry means to make a sound by sticking out your tongue and blowing. The sound produced is much like the sound made by flatulence (farting). Sounds are made when something vibrates and air blown between your tongue and lips causes both to vibrate as seen in the video.
Sound Facts
Sound is a form of energy produced by the vibrations (back and forth or to and fro motions) of a material. Sound is energy that can be heard by the human ear. It takes energy to produce a sound. For example, the test tubes shown in the photo are filled with different amounts of colored […]
Black Hole Facts
A black hole starts out as a star, which is very large. Stars give off light because of the nuclear reaction in its core. This reaction produces massive amount of energy resulting in extreme temperatures. The motion of particles increases with an increase in temperature. The kinetic energy of these particles is in an outward […]
Sound Facts
Sound is a vibration in an elastic material that is capable of being heard by the human ear. Vibration is a back and forth motion. Elastic is the ability of a material to compress and expand . Sound energy moves as a wave, thus is called sound waves. These waves cause a material to compress, […]
Good vs. Bad Acoustics
Acoustics has two meanings: (1) The science of acoustics is the study of sound, which deals with the production and transmission of sound. (2) The acoustics of a room indicates how sound acts in a room. Acoustical engineering understand the science of acoustics and use this knowledge in designing and building structures with specific acoustics. […]
Torque: Turning Effort
Torque Torque is the turning effort. To open a jar, you must apply a turning effort on the lid in a counterclockwise direction. To close a jar, you must apply a turning effort on the lid in a clockwise direction. The lid turns around a point in its center. A merry-go round also turns around […]
Archimedes: I.D.s Gold
Before the Greek mathematician and inventor Archimedes (C.287-212 B.C.), nobody knew why some things float and others don’t. It is said that Archimedes’ king gave a silversmith a certain amount of gold to make him a new crown. When the crown was finished, the king asked Archimedes to figure out a way to secretly decide […]
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