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Author Topic: ALL PHYSICS DOUBTS - POST HERE !!  (Read 229197 times)

Offline Raywin

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1200 on: May 25, 2010, 02:41:41 pm »
Quote from: Snake on May 25, 2010, 02:41:12 pm
Guys do we have to know Rutherford's nuclear model (I think it is the gold foil experiment thing)?

Itll be good if u do noe.. ;)
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Offline Vin

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1201 on: May 25, 2010, 02:42:16 pm »
Quote from: Ari Ben Canaan on May 25, 2010, 02:35:15 pm
Its up to you, honestly

Your theory is wrong. It is the CHANGE in VOLUME that causes a PRESSURE Increase.

You see he is pushing the PISTON INWARDS = Volume decrease. This causes a PRESSURE rise

Ohh .. i see thanks :) yea Boyle's Law .. i used to think the other way ..
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Offline Raywin

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1202 on: May 25, 2010, 02:42:39 pm »
Hey guys, doubt. Are water waves longitudinal or tranversal? :S
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Offline Kojoudeh95

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1203 on: May 25, 2010, 02:43:42 pm »
Quote from: Raywin on May 25, 2010, 02:42:39 pm
Hey guys, doubt. Are water waves longitudinal or tranversal? :S

They are longitudinal :D
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Offline Raywin

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1204 on: May 25, 2010, 02:44:15 pm »
Quote from: Kojoudeh95 on May 25, 2010, 02:43:42 pm
They are longitudinal :D

Ryte thx..  ;D
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holtadit

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1205 on: May 25, 2010, 02:45:06 pm »
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Offline MasterMath

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1206 on: May 25, 2010, 02:45:33 pm »
Theyre actually transverse >_< im pretty sure
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holtadit

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1207 on: May 25, 2010, 02:45:43 pm »
Quote from: Raywin on May 25, 2010, 02:42:39 pm
Hey guys, doubt. Are water waves longitudinal or tranversal? :S

TRANSVERSAL
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Offline Kojoudeh95

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1208 on: May 25, 2010, 02:45:55 pm »
hey guys...can any1 tell me how cables over heat....Too much what causes overheating??? And how to solve this                                     A mains electrical circuit uses insulated copper cable and the cable overheats.
To prevent the cable overheating, how should the cable be changed, and why?

A Use thicker copper cable which has less resistance.
B Use thicker insulation which stops the heat escaping.
C Use thinner copper cable which has more resistance.
D Use thinner insulation which allows less heat to escape.
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Offline Kojoudeh95

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1209 on: May 25, 2010, 02:46:41 pm »
Quote from: Raywin on May 25, 2010, 02:44:15 pm
Ryte thx..  ;D

noo man am srry...i just wasnt thinking wen i typed...its transverse srry :D
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Offline Kojoudeh95

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1210 on: May 25, 2010, 02:47:46 pm »
Quote from: MasterMath on May 25, 2010, 02:45:33 pm
Theyre actually transverse >_< im pretty sure

I just wasnt concentrating wen i typed it...i was like not longtidudinal then i wrote it :P
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Offline Snake

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1211 on: May 25, 2010, 02:48:46 pm »
Quote from: Kojoudeh95 on May 25, 2010, 02:45:55 pm
hey guys...can any1 tell me how cables over heat....Too much what causes overheating??? And how to solve this                                     A mains electrical circuit uses insulated copper cable and the cable overheats.
To prevent the cable overheating, how should the cable be changed, and why?

A Use thicker copper cable which has less resistance.
B Use thicker insulation which stops the heat escaping.
C Use thinner copper cable which has more resistance.
D Use thinner insulation which allows less heat to escape.

The answer is A.
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Offline Raywin

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1212 on: May 25, 2010, 02:49:29 pm »
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Offline Raywin

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1213 on: May 25, 2010, 02:51:24 pm »
Quote from: Kojoudeh95 on May 25, 2010, 02:46:41 pm
noo man am srry...i just wasnt thinking wen i typed...its transverse srry :D

Haha.. its k.. happens.. ;) :P
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Offline diva_sparkles

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #1214 on: May 25, 2010, 02:51:42 pm »
Quote from: Kojoudeh95 on May 25, 2010, 02:45:55 pm
hey guys...can any1 tell me how cables over heat....Too much what causes overheating??? And how to solve this                                     A mains electrical circuit uses insulated copper cable and the cable overheats.
To prevent the cable overheating, how should the cable be changed, and why?

A Use thicker copper cable which has less resistance.
B Use thicker insulation which stops the heat escaping.
C Use thinner copper cable which has more resistance.
D Use thinner insulation which allows less heat to escape.

its A cos thiCKEr copper cable has less resistance as it is inversely proportional 2 area. N resistance heats da cables so this is how u prevent it frm overheating!!
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