the first one is

10N will give 4cm
30N will give 12cm

if they are arranged in parallel( like in the diagram)
the lenght will be divided

if they are arranged in series, the length will be the same.
if two of the springs are arranged in series,then it will be 2x    where x is the extension

the second one is

according to the formula V=IR, R=V/I( gradient of the graph)

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Added on November 27, 2010, 7:29 pm
you are correct, but i don't understand why it is D.

you said perfect sqare is any number that when square root the answer is an integer.

so 0,1 and 4 are perfect sqaure,so isn't the answer suppose to be C (3)?

so there are 2 answers?

the question is a little bit cacat,they should put find the possible ELEMENT of R. subset is like..set...isn't it?

Some consider 0 as a perfect square but some not, because some ppl definite perfect square as square of a POSITIVE INTEGER. If not wrong, the syllabus in our text book doesn't include 0 as a perfect square. The answer should be B.

any1 can explain to me what is mean by this progressions question?

QUESTION: write 0.8+ 0.08+ 0.008+ 0.0008+.........as a recurring decimal

there you go http://www.physics4spm.com/

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Added on November 28, 2010, 12:57 pm
whats recurring decimal?

does that mean recurring decimal cases can only occur in G.P(no A.P)  and the solution for this type of question is by finding the sum of infinity?

what will happen to the speed of sound when density of air increases?

given (a-3)u = (2b+1)v , find the value of a and b,if vector u and v are neither parallel nor zero vector...................

any1 can help??

No technically it's not about the kinetic theory. It's stated in my book. The spped of sound in solids is greater than speed of sound in liquid / gases.

Sound travels in air at about 330 / water 1400 and solids eg concrete at 5000ms.

yea the answer a=3 , b= -1/2

(a-3)u = (2b+1)v
non parralel means
a-3=0

2b+a=0
the rest, Im sure u can do it (:

yea it mean v and u can be any integers except 0......we can't determine what integer they are, thus in order to let v and u equal......just let both become 0. Zero vector rule only apply on the v and u but not the multiplier beside them =D

hmm...the asnwer suppose to be 110000Pa..i think

guys,how to do this?



the answer is C

how to do this also



answer is C E A

Always remember,

NILAI. WATAK + KATA KUNCI 1 + KATA KUNCI 2. HURAIAN 1 + HURAIAN 2.

anyone can teach me how to make 2 implications from a sentence?
like
a > 2 if and only if a = 3 (example)