SPM Thread 08/09 (V 3), SPM is coming soon..!!!! Final days..!!
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 Oct 30 2008, 08:34 PM
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Senior Member
4,583 posts Joined: Oct 2006 From: ... suddenly 1 week  
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QUOTE(pwincess @ Oct 30 2008, 07:47 PM) i duno this ques. help me. Fxs=impulse=20*0.5=10NsWhen a footballer kicks a ball which is at rest, a force of 20N is applied in 0.5 s. The impulse that is given to the ball is ?  |
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Oct 30 2008, 08:35 PM
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Senior Member
1,936 posts Joined: Nov 2006 From: Klang,Selangor 
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QUOTE(pwincess @ Oct 30 2008, 08:29 PM) i know i have to use the impulsive force fromula. but what is the value of m? should put the mass of the football for m.... |
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Oct 30 2008, 08:41 PM
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Junior Member
200 posts Joined: Oct 2007 
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QUOTE(work_tgr @ Oct 30 2008, 08:34 PM) Fxs=impulse=20*0.5=10Ns ic. thx  another ques. num 17 and 19 pls.  |
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Oct 30 2008, 08:56 PM
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Senior Member
3,871 posts Joined: May 2008 
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QUOTE(ryansxs @ Oct 30 2008, 08:19 PM) At x or at any place same level of x, the pressure is the same. but it said that pressure exerted by mercury onli..not total pressure lehSay at the left side of x, we can do a equation which looks like this Total Pressure(at left of x)=P(atm)+P(20cmHG) Unfortunately, we dont know the atmosphere pressure. Therefore, we can do equation for x Total pressure(at x)= (70cmHG)+P(20cmHG) since at same level, pressure is the same, pressure=90cmHG |
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Oct 30 2008, 09:00 PM
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Senior Member
671 posts Joined: May 2006
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my God, i tried studying sejarah and i already read half a chapter and then i fall asleep....
haven't even start reading biology and agama. =[ |
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Oct 30 2008, 09:01 PM
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Senior Member
3,871 posts Joined: May 2008
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QUOTE(pwincess @ Oct 30 2008, 08:41 PM) ic. thx 19.use mgh another ques. num 17 and 19 pls. |
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Oct 30 2008, 09:06 PM
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Junior Member
200 posts Joined: Oct 2007
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QUOTE(KingKongStudy @ Oct 30 2008, 09:00 PM) my God, i tried studying sejarah and i already read half a chapter and then i fall asleep.... same with me. i hate memorizing haven't even start reading biology and agama. =[  |
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Oct 30 2008, 09:13 PM
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Senior Member
4,583 posts Joined: Oct 2006 From: ... suddenly 1 week
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Q. 17, find out the tension of string for both M and m
Msin30=msin45 M/m=sin45/sin30 |
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Oct 30 2008, 09:35 PM
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Senior Member
3,871 posts Joined: May 2008
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sigh la..if i got fight with teacher the ques..many student will blame me..will hate me..nvm..pls give me all ur physics teacher hp number..haha..if my teacher mark it wrong, then call them...ahahahaha
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Oct 30 2008, 09:41 PM
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Junior Member
267 posts Joined: Dec 2006
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hell yeah !!1week + more to go !
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Oct 30 2008, 09:57 PM
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Senior Member
3,871 posts Joined: May 2008
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chemistry chap 8 hard to learn by myself?
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Oct 30 2008, 09:59 PM
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Junior Member
200 posts Joined: Oct 2007
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is it acid and base?
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Oct 30 2008, 10:00 PM
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Senior Member
3,871 posts Joined: May 2008
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salts..acid and bases quite fun..abt the neutralistion
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Oct 30 2008, 10:02 PM
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Junior Member
200 posts Joined: Oct 2007
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oh. salts. its quite easy if u memorize all of em.
which part u din understand? |
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Oct 30 2008, 10:03 PM
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Senior Member
3,871 posts Joined: May 2008
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haven study yet..wanna start later..study form 4 phy last chap..light
Added on October 30, 2008, 10:43 pmany method to memorise soluble and insoluble salt? This post has been edited by vick5821: Oct 30 2008, 10:43 PM |
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Oct 30 2008, 11:08 PM
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Senior Member
1,424 posts Joined: Sep 2007 From: Woodlands, Singapore
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QUOTE(vick5821 @ Oct 30 2008, 08:56 PM) but it said that pressure exerted by mercury onli..not total pressure leh The 70cm also exerted pressure on x..It raise up because of the atmospheric pressure.. |
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Oct 30 2008, 11:20 PM
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Senior Member
3,871 posts Joined: May 2008
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x can be anywhere..if nt at there..it just 20 cm Hg..pressure at same level is equal la..
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Oct 30 2008, 11:22 PM
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Senior Member
1,424 posts Joined: Sep 2007 From: Woodlands, Singapore
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QUOTE(vick5821 @ Oct 30 2008, 11:20 PM) x can be anywhere..if nt at there..it just 20 cm Hg..pressure at same level is equal la.. Now the x is at bottom..You must add that 70cmHg...Because it exerted presssure on x also...You must answer according to the diagram.. |
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Oct 30 2008, 11:27 PM
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Senior Member
3,871 posts Joined: May 2008
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no idea
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Oct 30 2008, 11:29 PM
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Senior Member
1,424 posts Joined: Sep 2007 From: Woodlands, Singapore
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QUOTE(vick5821 @ Oct 30 2008, 11:27 PM) no idea If the x at other place, you also must add up atmospgeric pressure..So it's just the same.. |
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