Physics, Chemistry and Biology: Post your doubts here!

[princess sofia]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s07_qp_6.pdf
Q5 part h
how do we know it was barium sulphate formed whn barium chloride also gives white ppt ????????????

 

[Awesome12]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s07_qp_6.pdf
Q5 part h
how do we know it was barium sulphate formed whn barium chloride also gives white ppt ????????????

but there is no reference to barium
have you posted the correct link?

 

[princess sofia]

but there is no reference to barium
have you posted the correct link?

in the table part e (i) it says dat they added barium nitrate

 

[asimkhanfar]

A

what is dichotomous key ??

dichotomous key is a key which is used to identify an organism from a group of unknown organisms by visible characteristics
It always branches into two

For example : more than 4 legs, go to 2
4 legs or less, go to 3

 

[asimkhanfar]

What's an acrosome?

An acrosome is an organelle within the human sperm cell (not sure about other organisms) that contains enzymes for fertilization when it reaches the egg to digest a pathway to the haploid nucleus

 

[Phoenix Blood]

I am having problem with moments. Especially stable,neutral and unstable equilibrium..plx help!!!!!!!!!!

Moment is the turning effect of force.
An object is in stable equilibrium when it doesn't turn.
An object is in unstable equilibrium when it is about to turn.
An object is in neutral equilibrium when it is continuously turning.

 

[Phoenix Blood]

Someone help me with Q.10,(b), (i) and (ii)

 

[Lola_sweet]

I am having problem with magnetism, forces and moments. Can anyone give me any advice on how to study these topics or any useful resources related to these topics. Thank You!

 

[Awesome12]

Someone help me with Q.10,(b), (i) and (ii)

b (i)
it says that for every 5.0 V applied, the spot covers 1 cm vertically
They have asked the maximum p.d applied which is equivalent to the amplitude of the wave
the amplitude of the wave is 1.5 cm which is
1.5 * 5 =7.5 V

 

[Awesome12]

b (ii)
the wavelength of the wave is 4.0 cm
thus the time taken/ time period is 4.0 ms

since frequency is inversely proportional to time period, the frequency will be
f= 1/0.004
f=250 hertz

 

[Dubi Pro]

b (ii)
the wavelength of the wave is 4.0 cm
thus the time taken/ time period is 4.0 ms

since frequency is inversely proportional to time period, the frequency will be
f= 1/0.004
f=250 hertz

this question man! the 9th one please try to solve this set one! its really tough for me!

 

[Dubi Pro]

b (ii)
the wavelength of the wave is 4.0 cm
thus the time taken/ time period is 4.0 ms

since frequency is inversely proportional to time period, the frequency will be
f= 1/0.004
f=250 hertz

this question man! the 9th one please try to solve this set one! its really tough for me! View attachment 37514

 

[Lola_sweet]

this question man! the 9th one please try to solve this set one! its really tough for me! View attachment 37514

Which paper is this?

 

[Dubi Pro]

Which paper is this?

i really dont knw, my sir has compiled all of the hardest CIE questions from oldest to new. so no clue.

 

[Phoenix Blood]

Arthropods have jointed legs.
What does jointed legs mean?

 

[Phoenix Blood]

A solution means a liquid dissolved in water or in any solvent?

 

[Usama Shahab]

I feel difficulty in solving paper6 can u suggest anything
thanks

 

[Usama Shahab]

These are 2013 MayJune Physics
All Variants
Paper 1
3 and 6
Enjoy Guyzzzzzzzzzzzzzzzzzzzzz!!!!!!!!!
suggest any thing which can help me to solve paper6
Any Suggested Notes!!!

 

[princess sofia]

I am having problem with magnetism, forces and moments. Can anyone give me any advice on how to study these topics or any useful resources related to these topics. Thank You!

watch lectures related to thm on youtube they help alot

 

[Allah's Slave]

I'll give IGCSE English as a Second language (Extended) 0510, in the coming session May/June 2014. So I'll take paper 2 and 4 which are extended but I'm having trouble in deciding wether to take Paper 5 Oral or Paper 6 Oral Coursework. And Is paper 5 a part of the extended syllabus and has grades starting from A* like every Extended version? So Basically can I take paper 5 if em takin paper 2 and 4 ?

And are Scientific Calculators allowed in the examination hall for IGCSE Physics 5054? Because simple calculators don't have the appropriate functions that are needed for the exam.