Biology; Chemistry; Physics: Post your doubts here!

[robinhoodmustafa]

I have this thing stuck in my head, probably because my concepts are not clear. Someone please help me with this. ASAP ofc The question is; When v electrolyse copper sulphate with inert electrodes, the copper is deposited at the cathode! Whereas the procedure for electroplatingWhen we electrolyse copper sulphate with copper as the anode and some other metal as the cathode the metal acting as cathode gets copper plated. WHY CAN'T WE JUST PLACE AN INERT ANODE AND THE METAL TO BE PLATED AS THE CATHODE AND DO ELECTROPLATING???? please xplain! :-/

In electroplating Copper on an object u place the object such as wire on to the Cathode and put impure copper on the anode and the electrolyte should be a copper salt. If u place an inert electrode than how can the e- Pass through and how will the copper be electroplated on the object. just think!

 

[robinhoodmustafa]

any notes i could get hold of...as only less timr has left and i have no idea about the chapter..

which subject?

 

[nidz]

Hmm, thank you

Ur welcum

 

[nidz]

im using chemistry matters. can u please tell me where exactly is this fuel cell covered in this book? or if u could tell me which book are you using?

Pg 313
But I find it better in Chem IGCSE Roger Norris

 

[nidz]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Chemistry (5070)/5070_w05_ms_1.pdf
Check the q13

Thanku sooo much!!!

 

[nidz]

Does anyone know if we can use ballpoint in papers?

 

[robinhoodmustafa]

Does anyone know if we can use ballpoint in papers?

ofcourse u can but only blue or black
and Pencil only in Paper 1 (MCQ)

 

[Iishrak]

https://www.xtremepapers.com/commun...really-confusing-chemistry-o-level-mcq.24396/ helpp me!

 

[Iishrak]

why

Does anyone know if we can use ballpoint in papers?

not :S

 

[papajohn]

Stuck at this question please help..

 

[Iishrak]

Stuck at this question please help..

in the 2nd question, it's because of apparent or real depth

 

[ijlalm]

How can a car have a constant speed but changing velocity..Physics_Kinematics... PLEASE HELP!!
And how can a free falling body have a constant acceleration but zero velocity???

 

[robinhoodmustafa]

https://www.xtremepapers.com/commun...really-confusing-chemistry-o-level-mcq.24396/ helpp me!

 

[nidz]

How can a car have a constant speed but changing velocity..Physics_Kinematics... PLEASE HELP!!
And how can a free falling body have a constant acceleration but zero velocity???

Constant speed and changing velocity happens in circular motion, when direction is contantly changing.
A free falling body reached a constant terminal velocity and zero acceleration when air resistance and weight become equal.

 

[nidz]

Stuck at this question please help..

Which past paper is it from?

 

[papajohn]

Constant speed and changing velocity happens in circular motion, when direction is contantly changing.
A free falling body reached a constant terminal velocity and zero acceleration when air resistance and weight become equal.

Good.. I salute your concept of Physics!

 

[Isha Atiq]

I want notes for locomotion topic fulfilling the requirements of CIE.

 

[zohra`xo]

Hi. Can someone please explain how a thermocouple works and how we can use it to measure the temp of flame of bunsen burner? Also, I know a thermocouple is really sensitive but what's the reason behind that? Thanks in advance

 

[robinhoodmustafa]

I want notes for locomotion topic fulfilling the requirements of CIE.

 

[usama321]

Salam everyone, can someone help me pls. There was this question in Physics atp about the effect of temperature on the resistance of a wire, and to make a circuit diagram and explain how you would carry out an experiment to show the effect. Now i am unsure about it, but i think that the resistance of the wire would increase with the increasing temperature. Am i right? Also, in the experiment, how should i increase the temperature of the wire to take the readings? What about passing a large current through it? I hope someone can clear my confusion
Thanks