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ALL CIE PHYSICS DOUBTS HERE !!!

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$!$RatJumper$!$:

--- Quote from: Deadly_king on November 11, 2010, 05:49:57 am ---It is said that the microphone M detects maxima and minima of intensity of sound.

Maxima and Minima takes place only when the two waves meet in anti-phase. ;)

The n indicates the number of wavelengths at which the two waves will meet. It may be any number, but in this case since it is in anti-phase it has to be an odd number.

Phase difference = 2(pie) / lambda is used to find the phase difference between two consecutive points only,i.e the two pints are less than one wavelength apart.

--- End quote ---

ok i get the rad part. But for the n part, isnt it meant to be n+1/2 ? why do you say it should be an odd number?

Deadly_king:

--- Quote from: $!$RatJumper$!$ on November 11, 2010, 05:57:02 am ---ok i get the rad part. But for the n part, isnt it meant to be n+1/2 ? why do you say it should be an odd number?

--- End quote ---

That's right. :D

When it is (n+1)/2, it usually is an odd number. ;)

birchy33:
HELP! How do you figure out questions where they ask for the distance between molecules and all that sort of stuff. Like the distance between solid and liquid?

TJ-56:

--- Quote from: Deadly_king on November 11, 2010, 05:42:37 am ---1. Form the equation you can note that mass is conserved.

Total initial mass : 18 and total final mass : 18 -----> ( Add the mass numbers of the different elements and particles taking part in the reaction )

Now you're asked how Energy is conserved.
Energy emitted = delta(m) x c2 = 1.1 MeV

Therefore for total energy to be conserved,
Mass energy of products + energy emitted = Initial mass energy of reactants.

The energy emitted is released in the form of kinetic energy of the alpha-particle. ;)

Hope you understand :)

--- End quote ---

Oh ok.
Thanks alot dk.

TJ-56:

--- Quote from: birchy33 on November 11, 2010, 06:03:45 am ---HELP! How do you figure out questions where they ask for the distance between molecules and all that sort of stuff. Like the distance between solid and liquid?

--- End quote ---

Well the distance between solid particles and liquid particles are quite similar, but its rather the movement of those particles that differ the most. In gases, the separation of particles are much greater than that of solids and liquids (approximately 10 molecular diameters).
Hope that was helpful and covered your question completely.

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