Help with Mano and barometer physics ASAP

[IGCSE O/L student]

sorry to disturb agn nd agn
the questions like.......400 mg radioactive material......has 5 days half life............wt will it be aftr 10 days........i dont gt dis! how to solve dese....its ppr 1 question physics

it's ok, u nvr disturb me. u jst help me 2 recall wat i'v studied.
0 half-life --- 400mg
1 half-life --- 200mg(dats after 5 days)
2 half-lives --- 100mg(dats after a total of 10 days)

 

[tribianni]

hehe dats cool den
ohhhhkay dat ws easy hehehe
shukriyan

 

[IGCSE O/L student]

ur welcum. ny more doubts, i'll help u.

 

[tribianni]

umm helpiee neededz
http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Physics (0625)/0625_w10_qp_11.pdf
Q-6,9,23

 

[IGCSE O/L student]

umm helpiee neededz
http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Physics (0625)/0625_w10_qp_11.pdf
Q-6,9,23

question 6: 3-1.2=1.8
1.8/6=0.3N
question 9: 16.4 is da total length. so da xtension is 16.4-15=1.4
xtrapolate da graph to find da weight, n u get 3.5N
question 23: wen u increase angle X, da refraction stops coz da angle of incidence xceeds da crtical angle. total internal reflection takes place, n da light is prevented frm leavin da glass block @ da top.

 

[Bouchra]

Practice. Practice makes perfect. You won't get any benefit from guessing the questions or even knowing them beforehand. Practice only gives you an idea of what sort of questions to expect, in what order they are and how much you need to study for them.

Quoting from one of my other posts to help in case you have no time to do that many practice papers.

After a couple of papers you will notice a pattern in the questions, the first few easy ones are General Physics, then it goes on to Thermal Physics, Physics of Waves, Electricity & Magnetism and last of all Atomic Physics. If you have CIE's book just revise in the order of the chapters....​

This is from one of my other posts... also, in your case, check out some of the videos on Youtube/Khan Academy on certain areas that confuse you.

Also when reading your textbook, first read the summary at the beginning of the chapter and the end of the chapter. Then proceed to read the parts of the chapters that you found confusing to understand from just the summary. Remember that most formulas and other calculations in Physics involve arithmetic mostly and a bit of simple algebra.... make sure you understand how to manipulate an equation to solve for another variable... try to remember the symbols that stand for different concepts.

Also, relax and sleep early tonight. Tomorrow morning you can catch up with the rest of the stuff. You don't want to do a stupid mistake on the exam because you were sleepy or had a headache or something.

And don't forget to ask dua for yourself and for others who helped you. May Allah make these exams easy for us and help us do our best and exceed it.

 

[tribianni]

This is from one of my other posts... also, in your case, check out some of the videos on Youtube/Khan Academy on certain areas that confuse you.

Also when reading your textbook, first read the summary at the beginning of the chapter and the end of the chapter. Then proceed to read the parts of the chapters that you found confusing to understand from just the summary. Remember that most formulas and other calculations in Physics involve arithmetic mostly and a bit of simple algebra.... make sure you understand how to manipulate an equation to solve for another variable... try to remember the symbols that stand for different concepts.

Also, relax and sleep early tonight. Tomorrow morning you can catch up with the rest of the stuff. You don't want to do a stupid mistake on the exam because you were sleepy or had a headache or something.

And don't forget to ask dua for yourself and for others who helped you. May Allah make these exams easy for us and help us do our best and exceed it.

thnxxx fr da tips........
InshAllah

 

[vishal]

1

sorry to disturb agn nd agn
the questions like.......400 mg radioactive material......has 5 days half life............wt will it be aftr 10 days........i dont gt dis! how to solve dese....its ppr 1 question physics

100..