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Author Topic: Maths & Physics Help  (Read 53404 times)

Offline sweetsh

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Re: Maths & Physics Help
« Reply #135 on: April 24, 2009, 01:25:37 pm »
I wanted to say this
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Offline sweetsh

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Re: Maths & Physics Help
« Reply #136 on: April 24, 2009, 01:30:34 pm »
Astar how do we solve this equation(additional maths) but using ln?
log2x-log4(x-4)=2
?
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Offline kenyas sweetheart

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Re: Maths & Physics Help
« Reply #137 on: April 24, 2009, 01:40:54 pm »
hi, i need help in this question please:
may, june 03,
question 2b.
how do we find the speed? do we add? or minus? help pls, =)
and the same paper 7c.
whats the apparatus we need?
please help me!
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Offline astarmathsandphysics

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Re: Maths & Physics Help
« Reply #138 on: April 24, 2009, 01:41:06 pm »
log2x=log4x2

we have log4x2-log4(x-4)=2

log4(x2/(x-4))=2

(x2/(x-4)=42 so x2=16(x-4)=16x-64

so x2-16x+64=0
(x-8)2=0 so x=8
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Offline astarmathsandphysics

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Re: Maths & Physics Help
« Reply #139 on: April 24, 2009, 01:43:13 pm »
Quote from: kenyas sweetheart on April 24, 2009, 01:40:54 pm
hi, i need help in this question please:
may, june 03,
question 2b.
how do we find the speed? do we add? or minus? help pls, =)
and the same paper 7c.
whats the apparatus we need?
please help me!

What course code is this question from?
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Offline sweetsh

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Re: Maths & Physics Help
« Reply #140 on: April 24, 2009, 01:44:00 pm »
Oh! Thank youu
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Offline SGVaibhav

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Re: Maths & Physics Help
« Reply #141 on: April 24, 2009, 02:35:39 pm »
Quote from: astarmathsandphysics on April 24, 2009, 01:22:48 pm
It is only a 1 mark question. Why do you have nightmares? Use a meter rule either on the bench or in a clamp.

i dont know why i am scared   :'( :'(
i get scared when nothing goes in my mind.
what is a clamp?
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Offline SGVaibhav

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Re: Maths & Physics Help
« Reply #142 on: April 24, 2009, 02:36:51 pm »
sweetsh, which maths do u take? (normal IGCSE Maths?)
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Offline astarmathsandphysics

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Re: Maths & Physics Help
« Reply #143 on: April 24, 2009, 02:40:51 pm »
Quote from: sgvaibhav on April 24, 2009, 02:35:39 pm
Quote from: astarmathsandphysics on April 24, 2009, 01:22:48 pm
It is only a 1 mark question. Why do you have nightmares? Use a meter rule either on the bench or in a clamp.

i dont know why i am scared   :'( :'(
i get scared when nothing goes in my mind.
what is a clamp?
Clamp metal rod with hand attached, worked by a screw so you can open and close the fingers.
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Offline sweetsh

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Re: Maths & Physics Help
« Reply #144 on: April 24, 2009, 02:42:49 pm »
Im taking normal IGCSE Maths and in addition to it "Additional Maths"
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Offline astarmathsandphysics

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Re: Maths & Physics Help
« Reply #145 on: April 24, 2009, 02:45:08 pm »
I knew that. That's why the call me Sherlock.
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Offline SGVaibhav

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Re: Maths & Physics Help
« Reply #146 on: April 24, 2009, 02:47:00 pm »
 ??? ???
u mean both? (IGCSE and ADDITional Maths?)

is that a clamp? when i went to search for clamps in google, i got weird dolls and all that. so i wanted to ask, is this a clamp?
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Offline sweetsh

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Re: Maths & Physics Help
« Reply #147 on: April 24, 2009, 02:50:27 pm »
Yes sgvaibhav  both.

By the way Im forced for the additional maths by my school
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Offline astarmathsandphysics

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Re: Maths & Physics Help
« Reply #148 on: April 24, 2009, 02:51:45 pm »
Quote from: sgvaibhav on April 24, 2009, 02:47:00 pm
??? ???
u mean both? (IGCSE and ADDITional Maths?)

is that a clamp? when i went to search for clamps in google, i got weird dolls and all that. so i wanted to ask, is this a clamp?


This is a laboratory clamp
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Offline SGVaibhav

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Re: Maths & Physics Help
« Reply #149 on: April 24, 2009, 03:01:23 pm »
btwww

how can that be aligned to calculate the dist between lens and screen.

THIS IS PISSING ME OFF WHILE I DONT WANT TO GET PISSED OFF.
HRMPH  WHY AM I GETTING PISSED OFF?
lol   haahahah typing made me laugh. yeeeeh im not pissed off anymore
:D ;D ;D ;D ;D ;D :D :D :D 8) 8) 8) 8)

sigh chill pill
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