Author Topic: Help for Quantum Phys A2  (Read 2967 times)

Offline ruletheworld

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Help for Quantum Phys A2
« on: June 02, 2009, 10:20:11 am »
heyy....i know its late but can any1 explain the point in 25 (b) and (d)  ???

m kinda freaked out abt the 2 p4s tomoro  ???

done revisin physics almost but chem is left

help pleaseee!

Thanks

best wishes to all :)

Offline ruletheworld

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Re: Help for Quantum Phys A2
« Reply #1 on: June 02, 2009, 10:22:39 am »
and oops
its charged particles, not quantum :P

my bad :P

i hope they don't give qs from this :S


Offline LupeFiasco

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Re: Help for Quantum Phys A2
« Reply #2 on: June 02, 2009, 10:26:21 am »
aight jus hold on a min.

Offline LupeFiasco

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Re: Help for Quantum Phys A2
« Reply #3 on: June 02, 2009, 10:31:37 am »
you got to use the milikan's experiment if u know what it is.

Offline ruletheworld

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Re: Help for Quantum Phys A2
« Reply #4 on: June 02, 2009, 10:35:45 am »
jus the milikan's?  ???

Offline LupeFiasco

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Re: Help for Quantum Phys A2
« Reply #5 on: June 02, 2009, 10:38:36 am »
jus the milikan's?  ???


Yes jus the milikan's exp. and its 3 importance:

1. It show electricity has an atomic nature: the charge of an electron is like the atom of an electricity.

2. Gives out the value of avogadro's constant.

3. Mass of electron (electronic mass) is determined.

Offline LupeFiasco

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Re: Help for Quantum Phys A2
« Reply #6 on: June 02, 2009, 10:40:58 am »
this is for (b) part. For (d), explain the movement of charge through an electric or magnetic field, similar to an ossciloscope..........then by using centripetal force or cent. acc. formula, you get the velocity and acceleration.

Offline LupeFiasco

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Re: Help for Quantum Phys A2
« Reply #7 on: June 02, 2009, 10:45:02 am »
want further explanation ? ............what's ur name By the way, or ur nickname i might know u.........they call me don because' it's d last syllable on my name.

Offline eye-candy

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Re: Help for Quantum Phys A2
« Reply #8 on: June 02, 2009, 01:49:58 pm »
urmm.....hw does milikans exp. giv avagadros constant??

Offline LupeFiasco

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Re: Help for Quantum Phys A2
« Reply #9 on: June 02, 2009, 11:48:14 pm »
urmm.....hw does milikans exp. giv avagadros constant??

if u know stoke's formula........

1. To displace 1 mole of matter, 96,487 coulumbs (=1 Farad) is required (standard).
2. Then electronic charge or basic charge is (1.6x10^-19).

3. thereby, [96,487 / (1.6x10^-19)] = 6.03x10^23.

P.S electronic charge is found from stoke's formula (not required, u jus gotta know that electronic charge found from exp. is such value) and the displacement of 1 mole requiring 1farad is general stuff. You use the formula:

{ F=L/e }

Offline LupeFiasco

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Re: Help for Quantum Phys A2
« Reply #10 on: June 02, 2009, 11:49:36 pm »
*stoke's formula not part of syllabus.