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when they ask for a straight line graph do u draw a line between each point using a ruler? cuz then sometimes it doesnt appear as a straight line but crooked instead.
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It depends on graphs, and u shud never draw a graph with a ruler unless the gradient is constant ..when they ask for a straight line graph do u draw a line between each point using a ruler? cuz then sometimes it doesnt appear as a straight line but crooked instead.
CHEMISTRY HELP
Hey, can anybody teach me how to draw structural formula's of polymers ?? please it is important =[
heyyyyy thanks al00ot !! that reaaaly helped me, thanks soooo much =] !!!there are types of polymers ( natural and condensation, synthetic )
Synthetic:
( polyethene, polychloroethene, are important)
e.g monomer of polyethene is simple ethene ( CH2=CH2 ) so extend it and remove the double covalant chain like this ( CH2-CH2...........so on depends on how much question demand )
Have a look at this ... hope it will help.View attachment 10358View attachment 10358View attachment 10358View attachment 10358View attachment 10358View attachment 10358View attachment 10359 View attachment 10358
i dun use my hotmail acc, its cl0sed =\will post more soon or give me ur email
thank you soo much dear but still i have some doubt! in question 1 (c) the height is 12 i think :/ thn 0.5*12*5...pls make it clear ;/Question 1 (c) u have to simply find the area under the graph, that is 1/2*b*h , so 0.5*5*10.5 = 26.25
Question 8 (c) Decreases because resistance increases causing the current to decrese =)
Question 8 (d) 4 ohms, because the resistance will double ..
Alpha goes into paper because it gets absorbed , charge, alpha carries a +2 charge,
Beta goes out of paper because it can pass through paper (in tiny ammount) charge always -1 (electrons)
Gamma nothng happns, and no charge, never it carries charge,
Hope i helped =]
will post more soon or give me ur email
no they tell u in the question... smooth curve is free hand but the thingis im not sure with the straight line graph thing. Gradient are almost never constant in chem.In chem p6, when v draw the graph, how do v noe whether 2 draw freehand or with a scale? sby plz clarify
just write the marble chips will be visible after the reaction (unreacted)
welcomeheyyyyy thanks al00ot !! that reaaaly helped me, thanks soooo much =] !!!
http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Physics (0625)/0625_s04_qp_3.pdf
Q7- How do we know which are compressiona and rarefactions? as the line consist same kind of '-' :/
http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Physics (0625)/0625_w04_qp_3.pdf
q-4 a (i)
q-9 a (ii)
its the same !! what we learnt isbut in my book INDEX OF REFRACTION= sin i/sin r
but in marking scheme REFRACTIVE INDEX= speed in air/speed in glass
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