For question 13, which may be viewed as 3 in the tif,

isn't the height giving out the same pressure, so my answer for it

is that:

iii has the greatest pressure then, ii = i .

But the answer is i=ii=iii. Why?

 

For the last question on the right bottom,

I could predict the phenomenon but cannot explain it very clearly,

May anyone explain it ?

http://hk.geocities.com/quarkquarkquark2001/physics.gif

I don't know why it can't be showed directly by IE but Firefox, it may be downloaded first.

And, this is also my problem, can anyone explain this too?

that makes NO sense, iii has more height, "mm h20" IS a recognised pressure value.

 

"how much pressure is exterted on the bottom of the container"

it might mean force instead... actually, no, that would give ii as the greatest followed by i=iii

 

perhaps it's a mistake.