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PHYSICS 101

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by

Sarah Thomas

on 2 April 2013

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Transcript of PHYSICS 101

Sound Vibration, string, and tension:
For sound in this project we used a rubber band to demonstrate different frequency and vibration. When the rubber band is plucked it vibrates, which is what creates the sound. When the rubber band is tightened, it causes more tension, making the sound become a different pitch. Also, the higher the pitch of a sound, the greater the frequency. Sound is the mechanical radiant energy that is transmitted by longitudinal pressure(which is caused by vibration) waves in a material medium (as air) and is the objective cause of hearing. Vibration: A periodic motion of the particles of an elastic body or medium in alternately opposite directions from the position of equilibrium when that equilibrium has been disturbed (as when a stretched cord produces musical tones or molecules in the air transmit sounds to the ear). Physics Chapter Challenge Color Shadows Shadows A shadow is a partial darkness space, that has cut the source of light rays off due to an object.
In a shadow there are two pieces. There is a penumbra and umbra.
Penumbra: The outer part of the shadow
Umbra: The main part of the shadow. Reflection Every object has reflection, whether they are rough or smooth. All objects reflect light, anything that has mass and uses matter reflects light. However, some objects reflect energy. When the incident ray hits the mirror, the same angle and degree it came in, it leaves at the exact same. Reflection is where an object bounces off of another object, causing it to go in another direction or back to the starting point. Frequency: The number of cycles a vibration makes in a given time period. Many colors can be mixed together to create different colors. The white light has every single color of the rainbow in it.
R.O.Y.G.B.I.V is a small part of the electromagnetic spectrum.
All the colors of the rainbow go into the object except for the color of the object, it is reflected.
For example: If you have a red car all the colors of the rainbow go into the object, except for the color red, it reflects off of the object Sound:Mechanical radiant energy that is transmitted by longitudinal pressure waves in a material medium (as air) and is the objective cause of hearing. Lasers Lasers produce a stream of light... The light is a beam of coherent electromagnetic radiation usually in the ultraviolet, visible, or infrared regions of the spectrum. Sound waves Sound waves are created by sound. They allow us to hear things.Sound waves exist as variations of pressure in a medium such as air. They are created by the vibration of an object, which causes the air surrounding it to vibrate. The vibrating air then causes the human eardrum to vibrate, which the brain interprets as sound. Pitch The pitch depends on the amount of water in each glass. As the amount of water increases the pitch decreases. This is an inverse relationship.
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