Sunday, May 5, 2013

week of April 29

this week we started learning about wave lengths. we learned that a compressed part of a slinky in a longitudinal wave  is called a compression, while the uncompressed part is called a rarefaction. the true definition of a longitudinal wave- energy transfers in the same or parallel direction that the object moves.while a  transverse wave- energy transfers perpendicular to object motion. we also learned some definitions. wave length- distance between two successive ( in a row) points on a wave
period- time for one cycle
frequency- how many full cycles happen per second 
amplitude- maximum displacement from the zero line ( equilibrium point) 
oscillation - cycling between two extreme points, usually opposites

wave interference. 1) constructive when the waves build up happens when the waves are going the same way 2) destructive where the waves cancel each other out. the speed of a wave is measured by the wavelength \ period.
wavelength / period= speed
period = 1/frequency
wavelength* frequency= speed

Speed= V
Wavelength= lambda
frequency= curly q 

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