Qualification > Sciences

P.H.Y.S.I.C.S P2 D.O.U.B.T.S CIE

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nid404:

if you use your way you get -0.35

if you use what they did you get +0.35

Since momentum is a vector quantity I would have gone with the first option. But since this is change in momentum, they have ignored the direction i guess  :-\

halosh92:

--- Quote from: nid404 on June 06, 2010, 07:53:03 am ---if you use your way you get -0.35

if you use what they did you get +0.35

Since momentum is a vector quantity I would have gone with the first option. But since this is change in momentum, they have ignored the direction i guess  :-\


--- End quote ---

hows that possible ??? ???

leebux101:
uncertainties are always rounded off to one sf
i am sure of tht

notes on any topic.  but they should be short brief at-a-glance kinda ones...

nid404:

--- Quote from: Bakhtawar on June 06, 2010, 09:27:01 am ---uncertainties are always rounded off to one sf
i am sure of tht

notes on any topic.  but they should be short brief at-a-glance kinda ones...

--- End quote ---

Nope not always. Check mcq papers...it's not always 1 dp. It's should be either equal to or less than the significant figures of your answer.

Ohkay I'll look

leebux101:
ok thankyouuuu!!

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