Your p is pressure or roll (how you spell that)?

Pressure = Force/Volume
Roll or Density = Mass/Volume

Roll and density is the same fyi.

F=ma?
18 = 3a
a = 6ms^-2

the uniform velocity meant there is no resultant force (or friction).
Or is it?

Not too sure

kidney is quite easy if u understand the whole process. i have trouble understanding meosis mitosis all that

---

Added on October 29, 2008, 10:15 pmi get the same answer as u. but the answer in the book is 4.
the ques got prob maybe

This post has been edited by pwincess: Oct 29 2008, 10:15 PM

Ok every question in Moral regarding definisi need to have relation with the situasi UNLESS they ask for maksud nilai. This include essay question. You can't just blindly write out the definisi. Check the example given

Constant velocity means zero acceleration.
So following F=ma, the resultant force needs to be zero, to cause the acceleration = 0.
Thus there is a frictional force needed to cause the resultant force = 0
So, I think they left out a 6N of horizontal force.

Then, the calculation will be like this.
18-6 = 3a
12 = 3a
a = 4ms^-2


Not quite too sure again.
Someone can verify or acknowledge what I'm trying to say?
If I'm wrong, correct me too.
Thanks

This post has been edited by HotChocolate: Oct 29 2008, 10:38 PM

Rho. That's right! That's how you pronounce.

To solve all your Greek alphabet pronunciation problem visit http://en.wikipedia.org/wiki/Greek_alphabet#Main_letters

hey any1 know cikgu daiwa?


ppl say his notes for sejarah is effective and accurate. i just need some1 to clarify this .

I tuition with cikgu daiwa teacher,cikgu siiva..

Their note is very similar and effective...but no one know weather it is accurate.

really? u still have em?
post it up here!

one phy ques here

This post has been edited by vick5821: Oct 30 2008, 02:28 PM


Attached thumbnail(s)

P
=(0.7+0.2)(13600)(10)
=1.224x10⁵

Am not good in this question, what's the answer?

it said mercury onli wor.nid to add the 70 cm?.tis is today my exam ques..haih..hope nt ur working..

This post has been edited by vick5821: Oct 30 2008, 02:37 PM

i think ur rite. coz the pressure inside the vacuum is equal to the pressure of the mercury.
think so

correct

but it said mercury onli..not mean total pressure

x is at the bottom of the tube. at that point, the mercury pressure will also include the pressure from the mercury inside the tube.
ignore this ... I think it is not correct.

This post has been edited by work_tgr: Oct 30 2008, 02:43 PM

Their answer correct...Vacumm no pressure..
Mean pressure exerted on x is 90cmHg

-- but this question is tricky.
20cmHg might be correct and it depends on how your teacher interpret it.
"fight" for marks if you want.

This post has been edited by work_tgr: Oct 30 2008, 02:44 PM

but at the bottom also X..so just 20 cm ma

ya, see my correction.
just 1 mark only, donate it lah.