Physics, Chemistry and Biology: Post your doubts here!

[Incartyyy]

For biology
in labelling do the lines need to be in ink and also labels
wat ar ethe most important drawing for the labelling questions

the label lines should be clear and go precisely to the part labelled..AVOID ARROWS!!

 

[princess sofia]

plz help quick

 

[Muhammad_Hamza]

Plz help me in this part

 

[My Name]

the label lines should be clear and go precisely to the part labelled..AVOID ARROWS!!

but shud they be in pen or pencil
thanku!

 

[princess sofia]

guys plz some1 ans my question
difference btwn teeth of dog n human ?

 

[My Name]

guys plz some1 ans my question
difference btwn teeth of dog n human ?

https://answers.yahoo.com/question/index?qid=20080721172012AAe8weI
I googled it!

 

[Incartyyy]

but shud they be in pen or pencil
thanku!

well diagrams and labelled lines r in pencil for sure

 

[Incartyyy]

https://answers.yahoo.com/question/index?qid=20080721172012AAe8weI
I googled it!

dogs have more number canines as compared to humans

 

[Incartyyy]

Plz help me in this part

well how's the magnetic field produced when there is no alternating current..

 

[Awesome12]

well how's the magnetic field produced when there is no alternating current..

this is the case of an electromagnet. The iron is magnetized and then induces magnetism in the coil

 

[Ameena Eesa]

Aswk. Can anyone explain why and what color change comes about when:

a) KMnO4 reacts with Fe(II)Cl, i.e, Iron(II) Chloride
b) KMnO4 reacts with SO2
c) KI reacts with H2O2, i.e Hydrogen Peroxide

I guess these are redox reactions, can you also show, even by completing the reaction?
Much appreciated! Urgent, plz

 

[Ameena Eesa]

Plz reply

 

[Ameena Eesa]

Do lead, iron and hydrogen react with dil. acids?

 

[Awesome12]

Do lead, iron and hydrogen react with dil. acids?

Lead and iron do

Aswk. Can anyone explain why and what color change comes about when:

a) KMnO4 reacts with Fe(II)Cl, i.e, Iron(II) Chloride
b) KMnO4 reacts with SO2
c) KI reacts with H2O2, i.e Hydrogen Peroxide

I guess these are redox reactions, can you also show, even by completing the reaction?
Much appreciated! Urgent, plz

Look at these animations
http://learnthings.co.za/content/se...e10/chemicalr/redoxreac/colourcha/default.htm

 

[Mavilda Bucket]

Do birds have waterproof feathers or oil glands which prevents their feathers from absorbing the water

 

[Awesome12]

shoaib672002
shazmina
View attachment 40809

Could you post circuit one and two?

 

[shoaib672002]

Umar Ahmed I will answer them after the Friday Prayer Okay

 

[rida.12.!!]

what mass of hydrogen is produced when 10.0g of aluminium reacts with excess hydrochloric acid?
2al+6hcl-->2alcl3+3h2

 

[Ameena Eesa]

Lead and iron do


Look at these animations
http://learnthings.co.za/content/se...e10/chemicalr/redoxreac/colourcha/default.htm

Thank you, bro. And could you tell me one more thing, that, what are the products of heating a metal
1) Nitrate
2) Hydroxide

Does it differ from metal to metal?
Thank you.

 

[shoaib672002]