Author Topic: Physics Help HERE ONLY !!  (Read 81578 times)

Offline susman

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Re: Physics Help HERE ONLY !!
« Reply #225 on: June 01, 2009, 05:05:51 pm »
@Shogun and many other members..
thanks alot you all
it was kinada like note revision reading your posts:D

plus I will also be asking questions.:)

1)How to make lenz drwaing...(like draaw the rays from object to mirror and then refract thru the preincipal focus and stuff any notes on that..?
2)can any1 expalin potectial divider in detail with examples.. i really didnt understand  till now...
3) what is caron dating..

thanks in advance...

Offline esso

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Re: Physics Help HERE ONLY !!
« Reply #226 on: June 01, 2009, 05:50:35 pm »
CAN ANY ONE ANSWER THIS QUESTION....ITS FROM MY BOOK..]
IT SAYS
A 12 N FORCE AND A 5N FORCE ACTS AT THE  SAME POINT...
A)WHATS THE GREATEST RESULTANT THAT THESE FORCES CAN PRODUCE????

B)WHATS THE LEAST RESULTANT THAT THE FORCES CAN PRODUCE?????

PLEASE ANSWER...WHO KNOWS IT MIGHT COME IN THE EXAM ;)

Offline astarmathsandphysics

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Re: Physics Help HERE ONLY !!
« Reply #227 on: June 01, 2009, 06:03:50 pm »
Potential divider forumola Vout=\frac{V_(in)*R_B}{R_A+R_B}

The effexct is that the input voltage is divided in the ratio of the resitance in the circuit
« Last Edit: June 01, 2009, 06:07:27 pm by astarmathsandphysics »

Offline astarmathsandphysics

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Re: Physics Help HERE ONLY !!
« Reply #228 on: June 01, 2009, 06:08:59 pm »
CAN ANY ONE ANSWER THIS QUESTION....ITS FROM MY BOOK..]
IT SAYS
A 12 N FORCE AND A 5N FORCE ACTS AT THE  SAME POINT...
A)WHATS THE GREATEST RESULTANT THAT THESE FORCES CAN PRODUCE????

B)WHATS THE LEAST RESULTANT THAT THE FORCES CAN PRODUCE?????

PLEASE ANSWER...WHO KNOWS IT MIGHT COME IN THE EXAM ;)

A0When the act in the same direction R=5+12=17

B)When they act in opposite direction R=12-5=7N

Offline esso

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Re: Physics Help HERE ONLY !!
« Reply #229 on: June 01, 2009, 06:18:05 pm »
THANKS ASTAR REALY APPRECIATE IT....

Offline Hope

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Re: Physics Help HERE ONLY !!
« Reply #230 on: June 01, 2009, 08:54:31 pm »
To all those who are embaressed by resorting to Fleming's left-hand rule :p there is an alternative way!

If you notice how we play around with our fingers to get the answer haha; we're actually positioning our fingers on axes..

Fleming's left hand rule says that the third finger is the current, second finger is the magnetic field and the thumb is the force.

Now, we can simply draw axes (including x,y,z) This can be seen in my attachment.

If the magentic field is on the x-axis (denoted as B), current is on the y-axis (denoted as I), then you begin to move from I to B, through the shortest distance between both. In this case, it is clockwise. Any clockwise rotation corresponds to a negative axis. And since the z-axis is the only one that has not been given, it must be on the negative z-axis. In other words, the force is into the page!

I hope I made this as simple as possible. :)

Offline Hope

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Re: Physics Help HERE ONLY !!
« Reply #231 on: June 01, 2009, 09:01:22 pm »
I also forgot to mention that any anticlockwise rotation corresponds to a positive axis.

Offline MaNa

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Re: Physics Help HERE ONLY !!
« Reply #232 on: June 01, 2009, 09:02:44 pm »
anyone has old pass papers for physics paper 3 n 1??
from 1993-2002
if so can some one send me on teenangel_MK@hotmail.com
thankyou
All ur dreams are made,when you're changed to a mirror and the razor blade!!!

Offline esso

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Re: Physics Help HERE ONLY !!
« Reply #233 on: June 01, 2009, 09:06:59 pm »
i want to ask a question....
solids which have high specific heat capacity....do they get warm rapidly or take more time to heat up????
nd why???

thanx in advance

Offline astarmathsandphysics

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Re: Physics Help HERE ONLY !!
« Reply #234 on: June 01, 2009, 09:11:17 pm »
They take more time to heat up since you have tyo put more heat in to raise the temperature

Offline studentforumuser

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Re: Physics Help HERE ONLY !!
« Reply #235 on: June 02, 2009, 08:46:43 am »
Hey,
So Can Someone plzz Tell me the most important things, you should know,
like things whuch are really important..
Thanks Anyway..!
=D

Offline frenzy1234

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Re: Physics Help HERE ONLY !!
« Reply #236 on: June 02, 2009, 09:15:37 am »
does any1 have a summary or any notes etc.... like the one q80boy had given for chemistry those really helped if any1 does pls mail it 2 me
im_gone92@hotmail.com

or just put it up here pls
love u guys <3 :-* :-*

Offline goin4dakill

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Re: Physics Help HERE ONLY !!
« Reply #237 on: June 02, 2009, 10:34:51 am »
Hey! Wont someone help me.
November 2008.
Question 1dii

PLEASE GUYS I BEG YOU! I do not understand how to get the answer!

Offline heat619

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Re: Physics Help HERE ONLY !!
« Reply #238 on: June 02, 2009, 11:20:53 am »
Is the image in the following cases real or virtual?

Mirror

Magnifying Glass

Periscope

thanx in advance

Offline nitcomp

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Re: Physics Help HERE ONLY !!
« Reply #239 on: June 02, 2009, 11:27:25 am »
Is the image in the following cases real or virtual?

Mirror

Magnifying Glass

Periscope

thanx in advance

all virtual