Author Topic: PHYSICS, CHEM HELP NEEDED  (Read 2762 times)

Offline godfather93

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Re: PHYSICS, CHEM HELP NEEDED
« Reply #15 on: February 16, 2010, 11:59:14 am »
can someone tell me what scalar and vector product is??

nid404

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Re: PHYSICS, CHEM HELP NEEDED
« Reply #16 on: February 16, 2010, 12:01:34 pm »
U mean product of a scalar and vector??
Product should be a vector

Offline godfather93

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Re: PHYSICS, CHEM HELP NEEDED
« Reply #17 on: February 16, 2010, 12:02:44 pm »
no no not that. Haven't u studied the product of 2 vector quantities?

nid404

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Re: PHYSICS, CHEM HELP NEEDED
« Reply #18 on: February 16, 2010, 12:06:35 pm »
no no not that. Haven't u studied the product of 2 vector quantities?

Are you talking about vector quantities literally or are u referring to vectors in terms of i,j,k??
Could you post an example sort of..

Offline godfather93

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Re: PHYSICS, CHEM HELP NEEDED
« Reply #19 on: February 16, 2010, 12:13:21 pm »
http://en.wikipedia.org/wiki/Cross_product
http://en.wikipedia.org/wiki/Dot_product

the above two links show the 2 ways of multiplying vectors (and ofcourse vector quantities)!!
« Last Edit: February 16, 2010, 12:16:07 pm by godfather93 »

nid404

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Re: PHYSICS, CHEM HELP NEEDED
« Reply #20 on: February 16, 2010, 12:42:22 pm »
I thought u were asking about physical quantities...like velocity,displacement :|

Offline godfather93

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Re: PHYSICS, CHEM HELP NEEDED
« Reply #21 on: February 16, 2010, 12:46:16 pm »
yes physical quantities are involved as well.

Ex. work done = vector F . vector S = F.S.cos x where x is the angle between the 2 vectors F(force) and S(displacement).

nid404

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Re: PHYSICS, CHEM HELP NEEDED
« Reply #22 on: February 16, 2010, 12:48:10 pm »
So what is your question...
You knw how to multiply vectors don't ya?

Offline godfather93

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Re: PHYSICS, CHEM HELP NEEDED
« Reply #23 on: February 16, 2010, 12:49:00 pm »
Actually my question is do u know why vectors can be multiplied in 2 ways to get 2 different answers? it's a hard q, i know.
« Last Edit: February 16, 2010, 12:50:31 pm by godfather93 »

nid404

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Re: PHYSICS, CHEM HELP NEEDED
« Reply #24 on: February 16, 2010, 12:51:30 pm »
Actually my question is do u know why vectors can be multiplied in 2 ways to get 2 different answers? it's a hard q, i know.

woopsy...nope...but ill try n find out

Offline godfather93

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Re: PHYSICS, CHEM HELP NEEDED
« Reply #25 on: February 16, 2010, 12:53:54 pm »
By the way, have u studied about vector multiplication (vector x vector)?

Offline astarmathsandphysics

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Re: PHYSICS, CHEM HELP NEEDED
« Reply #26 on: February 16, 2010, 03:54:28 pm »
Will do a page on vector and scalar products.

Offline astarmathsandphysics

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tarifhossain

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Re: PHYSICS, CHEM HELP NEEDED
« Reply #28 on: February 17, 2010, 07:24:51 am »
Thank you very much for the papers.