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Author Topic: ALL PHYSICS DOUBTS - POST HERE !!  (Read 229169 times)

Offline Snake

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1215 on: May 25, 2010, 02:52:10 pm »
Quote from: Raywin on May 25, 2010, 02:42:39 pm
Hey guys, doubt. Are water waves longitudinal or tranversal? :S

Water waves move up and down (oscillate) this is a property of a Transverse Wave.

Longitudinal waves compress and refract (squash and stretch)  

Just a lil extra knowledge!
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holtadit

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1216 on: May 25, 2010, 02:56:42 pm »
@ Snake  +rep :)
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Offline Baladya

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1217 on: May 25, 2010, 02:57:19 pm »
Quote from: Ari Ben Canaan on May 25, 2010, 02:56:42 pm
@ Snake  +rep :)

dude did u see my message?
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Offline Raywin

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1218 on: May 25, 2010, 02:58:12 pm »
Quote from: Snake on May 25, 2010, 02:52:10 pm
Water waves move up and down (oscillate) this is a property of a Transverse Wave.

Longitudinal waves compress and refract (squash and stretch)  

Just a lil extra knowledge!

Thanks a lot..! :D
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Offline Snake

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1219 on: May 25, 2010, 03:00:23 pm »
Quote from: Ari Ben Canaan on May 25, 2010, 02:56:42 pm
@ Snake  +rep :)

Thanks mate, By the way great ppt on the gold foil experiment, + rep for it :)
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Offline Kojoudeh95

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1220 on: May 25, 2010, 03:02:05 pm »
Can any1 help me in doin this!!! plZ :D!!! and plz explain indetail :P ;)
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Offline Ghost Of Highbury

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1221 on: May 25, 2010, 03:07:23 pm »
Quote from: Kojoudeh95 on May 25, 2010, 03:02:05 pm
Can any1 help me in doin this!!! plZ :D!!! and plz explain indetail :P ;)

say the voltage is 6V

first diagram the 100 ohms (connected to Voltmeter) gets 100/200 * 6 = 3

for the second diagram the 100 ohms gets 100/190 * 6 = 3.15

thus increases a little
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Offline Kojoudeh95

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1222 on: May 25, 2010, 03:10:03 pm »
Quote from: A@di on May 25, 2010, 03:07:23 pm
say the voltage is 6V

first diagram the 100 ohms (connected to Voltmeter) gets 100/200 * 6 = 3

for the second diagram the 100 ohms gets 100/190 * 6 = 3.15

thus increases a little

Thanks alot..i didnt think of it in that way...i just said in both cases its across the 100ohms so stays the same....thaaank youuu!!
:D :D :D ;) + rep :D
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Offline Ghost Of Highbury

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1223 on: May 25, 2010, 03:10:40 pm »
Quote from: Kojoudeh95 on May 25, 2010, 03:10:03 pm
Thanks alot..i didnt think of it in that way...i just said in both cases its across the 100ohms so stays the same....thaaank youuu!!
:D :D :D ;) + rep :D

No issues. Good luck with the exam.
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Offline Raywin

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1224 on: May 25, 2010, 03:13:32 pm »
Hey guys, i really dont understand the concept of reflective index. :/ can someone explain it to me? :) OH and another thing. Wht is the relationship between the resistance of a wire and its length and diameter? :S
« Last Edit: May 25, 2010, 03:16:50 pm by Raywin »
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Offline Ghost Of Highbury

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1225 on: May 25, 2010, 03:16:22 pm »
Quote from: Raywin on May 25, 2010, 03:13:32 pm
Hey guys, i really dont understand the concept of reflective index. :/ can someone explain it to me? :)

any specific question?
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holtadit

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1226 on: May 25, 2010, 03:17:01 pm »
A@di I'll leave it up to you now.

go ahead and help these people - I'm gonna take off :)
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Offline Raywin

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1227 on: May 25, 2010, 03:18:07 pm »
Quote from: A@di on May 25, 2010, 03:16:22 pm
any specific question?

Oh not really but it might come for mcqs right? :/ i havent seen any so far but i cant really take a chance..
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Offline Ghost Of Highbury

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1228 on: May 25, 2010, 03:23:20 pm »
Quote from: Raywin on May 25, 2010, 03:18:07 pm
Oh not really but it might come for mcqs right? :/ i havent seen any so far but i cant really take a chance..

theres not much to know abt it, just the formula

ALWAYS formula for refractive index depends from which medium it passes
eg .
From denser to rarer (glass to air) refractive index = sin r /sin i (i - angle of incidence, r - angle of reflection)
From rarer to denser (air to glass refractive index =  sin i / sin r

the refractive index is never less than 1, so if ur getting the value of d refractive index < 1..u gotta check for errors..
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Offline Raywin

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1229 on: May 25, 2010, 03:25:31 pm »
Quote from: A@di on May 25, 2010, 03:23:20 pm
theres not much to know abt it, just the formula

ALWAYS formula for refractive index depends from which medium it passes
eg .
From denser to rarer (glass to air) refractive index = sin r /sin i (i - angle of incidence, r - angle of reflection)
From rarer to denser (air to glass refractive index =  sin i / sin r

the refractive index is never less than 1, so if ur getting the value of d refractive index < 1..u gotta check for errors..

Thanks a lot!!   :D and another thing wht is the relationship between the resistance of a wire and its length and diameter?
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