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Author Topic: physics  (Read 3306 times)

Offline emi

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Re: physics
« Reply #15 on: May 10, 2009, 10:07:53 pm »
ic ... thanks
if any one could do Nov. 2003 Q1 d), that would be great
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Offline astarmathsandphysics

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Re: physics
« Reply #16 on: May 10, 2009, 10:13:00 pm »
Which paper?
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Offline sweetsh

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Re: physics
« Reply #17 on: May 10, 2009, 10:14:20 pm »
Astar it is definitely paper 6!
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Offline forkasha

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Re: physics
« Reply #18 on: May 10, 2009, 10:22:41 pm »
look the volume of the cylinder is = by* r2*r
then volume of m = 1/3 of the volume of the cylinder ..............right
so vm=1/3 by r3(0.6)3=0.5
i wish u have got it if not tell me may be i could explain more
good luck
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Offline emi

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Re: physics
« Reply #19 on: May 10, 2009, 10:49:32 pm »
i dnt get the formula u used .. and how u knew that m=1/2 ?
could u please explain little more .. i appreciate your help .  thanks alot
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Offline astarmathsandphysics

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Re: physics
« Reply #20 on: May 10, 2009, 10:53:55 pm »
Quote from: emi on May 10, 2009, 10:49:32 pm
i dnt get the formula u used .. and how u knew that m=1/2 ?
could u please explain little more .. i appreciate your help .  thanks alot

Use the formula Vm=1/3pi*r3
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Offline godfather93

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Re: physics
« Reply #21 on: May 10, 2009, 10:56:49 pm »
how do you know Vm is 1/3*pi*r3
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Offline emi

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Re: physics
« Reply #22 on: May 10, 2009, 10:58:23 pm »
yeah ,, how can anyone com up with that ??? how did the r turn r3  ??
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Offline astarmathsandphysics

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Re: physics
« Reply #23 on: May 10, 2009, 11:01:24 pm »
Cut off the bit at the bottom then from the centre of the hemisphere to the edge and the bottom =r so V=pi*r2h=pi*r3 and take away voume of hemisphere=2/3*pi*r3

Subtract to give Vm=1/3*pi*r3
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Offline sweetsh

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Re: physics
« Reply #24 on: May 10, 2009, 11:02:01 pm »
The forum today caused me a headache!
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Offline godfather93

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Re: physics
« Reply #25 on: May 10, 2009, 11:05:05 pm »
how do you know that the volume of the hemisphere is 2/3 of the volume of the sphere
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Offline emi

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Re: physics
« Reply #26 on: May 10, 2009, 11:05:55 pm »
exam is in one day .. expect anything ;)
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Offline godfather93

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Re: physics
« Reply #27 on: May 10, 2009, 11:06:22 pm »
ohhhhhhhhhh.... I get it. My bad, it's a hemisphere.
Thanks, finally i get it! :D
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Offline sweetsh

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Re: physics
« Reply #28 on: May 10, 2009, 11:07:02 pm »
I know! Im so in a rush and dont know how im studying 3 subjects at a time in addition to the forum!
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Offline emi

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Re: physics
« Reply #29 on: May 10, 2009, 11:11:41 pm »
why 3 subjects ?  focus on your physics for now .. i can only manage to study 2 subjects .. math at morning and Physics at night .. i cant handle more ..

don't strain your self dear .
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