Qualification > Queries
ANY DOUBTS HERE!!!
nid404:
Making it alkaline would be adding more hydroxyl anions...when conc of OH- ions increase, equilibrium will shift to the left to resist the change(le chateliers)
Amr Fouad:
--- Quote from: Metallicnak on April 13, 2010, 03:37:49 pm ---Sorry to break up all the Chem discussions guys :P but I need to get some physics doubts straight here.
1) Does a material vibrates at its maximum amplitude when its at its fundamental frequency compared to its other modes of vibration. If so then isnt fundamental frequency of a material the same thing as the materials natural frequency.
2) Can someone tell me the differences between a single slit interference and double slit and if light can produce an interference pattern through a single slit, when one of the double slits are covered sholdnt an interference pattern still be noticed?
3) Explanation of doppler effect when the observer is moving towards the source of sound.
Guys if u could speed up on ur replys i would be grateful hve a mock exam tommorow :-\
Much help appreciated! :)
--- End quote ---
1) First of all, do not confuse the fundamental frequency with the natural frequency. From your doubts I believe you are doing Edexcel Physics AS.
And the fundamental frequency does not mean vibration at the maximum amplitude, as you have infinite multiples of the fundamental frequency; first harmonic, second harmonic, etc..
2) Interference occurs only when you have to sources of waves. Thats the main difference between single and double slits. In a single slit, diffraction only occurs. But in a double slit, interference occurs due to diffraction of waves.
There is NO INTERFERENCE IN SINGLE SLITS.
3) The examiner never gives you the situation where the observer moves towards the source, the opposite happens. Check out this video.. It is really helpful [yt=425,350]http://www.youtube.com/watch?v=-t63xYSgmKE[/yt]
Sorry for the late reply.. I just got your post :-\
sweetie:
--- Quote from: nid404 on April 14, 2010, 07:36:24 pm ---Making it alkaline would be adding more hydroxyl anions...when conc of OH- ions increase, equilibrium will shift to the left to resist the change(le chateliers)
--- End quote ---
isnt precipitating more V3+ ions has the same effect , so why is option B wrong?????
nid404:
Reagents are used to detect the presence of a particular ion.....
So what they mean by precipitating V3+ ions is the already existing V3+ ions are being precipitated, they are dissolved prior to the addition...there's no change in conc/amount of V3+ ions, only the existing ions dissolved would be precipitated, this will not bring about a change in equilibrium
Metallicnak:
Thanks for the info ~ A.F ~ preety much cleared all the doubts :D, By the way no probs on the delay.
Thanks again.
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