We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
Click here to Donate Now (View Announcement)
Voltage , pd and emf all have the same Si units ie Volts and the same formula i.e J/C(joule/coulomb charge).
Which paper is this question exactly from..?? Because no such question is there in O level june 2002 paper 2...guys i need help please. bio past year m/j 2002 question 4.c
explain why the blood pressure in the left ventricles falls to zeroin the cardiac cycle, but the lowest blood pressure recorded in the arteries is about 10kpa.
answer :
i. (pressure falls to zero) because all blood expelled from ventricle
ii. (blood pressure falls to 1okPa) because elastic ffibres recoil.
iii. ref to smooth muscles qualified
iv. narrow diameter of capillaries/arterioles/small arteries
v, resistance to flow
i dont understand how they relate point ii-v to the low blood pressure in arteries. anyoneee can explain to meee ? thanks so much
http://misterguch.brinkster.net/molecalculations.htmlWhats the easiest way to learn the numericals of Moles???
step by step on how to solve moles oh nooo, i posted in the wrong thread. its A level .
sorry peeps
Hello , can someone explain to me why is the answer A for this question:
28. All ammonium salts on heating with sodium hydroxide produce ammonia gas.
From which ammonium salt can the greatest mass of ammonia be obtained?
A 0.5 mol (NH4)3PO4
B 0.5 mol (NH4)2SO4
C 1.0 mol NH4Cl
D 1.0 mol NH4NO3
This is from O/N/04, thanks
Thank you very much! I just realized that haha
Bcos it is a transition metal... Transition metals usually have catalytic properties.. Thats all u need to know fr this question...
Usually Physics matters is followed as it covers most, if not all, points. Although like all books it has got some mistakes. There are some topics not covered by this book whose good description you will find in Stephen Pople's book. Otherwise it's pretty good to follow as a text. As for the last one, I have heard that Stephen Pople's is not very descriptive.
Silvery gray.
Humid air contains a great deal of water vapour, so the concentartion gradient of water vapour between the surrounding air and the leaf is greatly reduced. And air can accept very little water vapour from plants.Can anyone pls help me out with IGCSE Biology June 2012 Paper 12 Q16.... the ans in the ms is A but I cant understand why..????? Pls help asap as i hv my exam tomo..!!
Try to do 10 years past papers and give importance to the areas which are difficult for you.how shld study for biology as i am going to appear for may june 13 ...................pls help
whr shld we concentrate more?
For almost 10 years, the site XtremePapers has been trying very hard to serve its users.
However, we are now struggling to cover its operational costs due to unforeseen circumstances. If we helped you in any way, kindly contribute and be the part of this effort. No act of kindness, no matter how small, is ever wasted.
Click here to Donate Now