September 8, 2008

-Piisu~!
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LOL

Anyways...

Deadline:
Job ad that needs Physics or something like that

Today, we started the unit about Waves by learning about Waves in One Dimension.

Vocabulary:

• continuous/periodic wave: a wave that is made by a disturbance that is moving back and forth periodically, i.e. the source is oscillating or vibrating.
• transverse wave: the particles of the wave vibrate up and down while the direction of motion is to the left or right.
• crest: high point on a wave.
• trough: low point on a wave.
• amplitude (A): maximum height of a crest or depth of a through from the equilibrium level (rest position).
• cycle: one complete oscillation (one complete up and down movement in the case of a transverse wave).
  
• wavelength (λ): horizontal length of one cycle of the wave; can be described as the horizontal distance between two successive crest/through or any successive equivalent points on the wave.
  
• longitudinal wave: the particles of the wave vibrate the same direction as the motion of the wave.
• frequency (f): number of cycles that pass a given point per unit of time; commonly measured in cycles per second or hertz (Hz).
• period (T): time elapsed between two successive crests/troughs/equivalent points passing by the same point in space.
• wave velocity (v): velocity at which the wave moves.
  
• longitudinal wave: the particles of the wave goes the same direction as the motion of the wave.
  
• compression: areas in a longitudinal wave that are momentarily close together.
• rarefactions or expansions: areas also in a longitudinal wave that are momentarily far apart.

Formulas to remember:
T = 1/ f
v = λ/T
v = f * λ
f = 1/T

Assignment:
Periodic and Frequency Problems Sheet
Vibrations and Waves Sheet
Characteristics of Waves Sheet
ALL DUE WEDNESDAY

Well... That's it...
Next scribe is arielle!