Gnawnibnib,gnawing and nibbing through (:


binbin

I am random, I am short.
I'm from 4J, I'm from horns.
I love ET, I love yam ice-creams.
I like GARFIELD!
Born from MAMA; 18/02/93 strikeitalicbold

chatterbox

Finally
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yesterday once more
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title: 4:58
date: Saturday, August 11, 2007
time:4:58 PM
My legs are numb now. Seating hear at the dining table for more than 3 hours and doing science and Geography. Okay it's more like GEOGraphy. The ARGUMENTATIVE ESSAY. Haix. How I wish this world is not turning more and more historic. LOL. SO SIANZ...... HAHAAHAA.I seem to lost the preserverance. LOL. HAHAA. HAHA. People without lives asking me to play CLUB PENGUIN..... =.= HAHAHA. GAL. ARRRgh. HAHAHA.





OK i shall talk about physics.





A wave is a phenomenon in which energy is transferred through vibrations or oscillations.





&Transverse waves


- Travel in s direction perpendicular to the direction of vibration.


- up -down


-E.g. rope waves, water waves.





&Longitudinal waves


- travel in a direction parallel to the direction of vibration


-to& fro


-Sound waves






Waves are repeated vibrations carrying energy.

Particles of the medium do not move with wave.

& The period, T
-time take to generate one complete wave.
-time taken for any given point on the wave to move a distance of one wave length.
- Si units: seconds /s

&Frequency, f
-The number of waves produced per second
-Si units: Hertz/ Hz

T=1/f [ relations of the period and the frequency]

&Wave speed, v
- the distance traveled by a wave in one second
- SI units :ms ^-1
- v= f入


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