Biology; Chemistry; Physics: Post your doubts here!

[scouserlfc]

oh great i missed more questions i was away two days and there is like whole 6 or 7 pgs filled with inquiries !

 

[SalmanPakRocks]

haha! don't worry mate, i m here to cover u!

 

[SalmanPakRocks]

need help in this question.

 

[Anon]

I think it is C.

 

[Anon]

About the recent discussion about adding water to H2SO4 and HCl, I found this:

http://answers.yahoo.com/question/index?qid=20080208211711AA2AdKp
http://answers.yahoo.com/question/index?qid=20081121155942AA9LIDt

 

[Anon]

Explanation why it is C:

25cm --> 120 C
1cm --> 120/25 = 4.8 C
15cm --> 72

As it is starting from -10, it would be 72-10 = 62

 

[SalmanPakRocks]

I think it is C.

I don't know the answer because it is from 2002.

 

[aashir12]

i want urgent help
in the chemistry syllabus topic 2.3 that is Structure and properties of materials i cant understand what this means;
deduce the physical and chemical properties of substances from their structures and bonding and
vice versa
i have searched many books but cannot find the relevant thing

 

[SalmanPakRocks]

well it ain't hard. You just have to tell the structure (properties) of material. Like for example metals are solid and have less inter-molecular space between them.

 

[snowbrood]

can anyone tell me what are superimposed magnetic fields

 

[SalmanPakRocks]

can anyone tell me what are superimposed magnetic fields

is this in the syllabus??

 

[Anon]

can anyone tell me what are superimposed magnetic fields

I too never heard of it..

 

[scouserlfc]

I too never heard of it..

I think that i heard this somewhere ill see if i can find it and ill let u know soon !

 

[Abdul96]

where can I get physics 2011 suggested answers? Plz help
Its urgent

 

[scouserlfc]

where can I get physics 2011 suggested answers? Plz help
Its urgent

In the Marking Scheme !

 

[legion]

umm can you please explain that hypo-tonic and hyper-tonic to me?? i mean i know what they are but i need some way to remember that. i always confuse them
thncx for the help btw. this thread is awesum

 

[Anon]

umm can you please explain that hypo-tonic and hyper-tonic to me?? i mean i know what they are but i need some way to remember that. i always confuse them
thncx for the help btw. this thread is awesum

This is Bio right?

if it isnt, I am in for a heart attack...

 

[SalmanPakRocks]

yeah it is, cuz I couldn't understand it either

 

[XPFMember]

umm can you please explain that hypo-tonic and hyper-tonic to me?? i mean i know what they are but i need some way to remember that. i always confuse them
thncx for the help btw. this thread is awesum

As-salam-o-alaikum!

hyper tonic: it is the solution which has a higher water potential than the other surrounding it (jus to explain...refer book for exact..i assume u already know)

hypotonic: it is the solution with lower water potential...than the other

how to keep this in mind?? well see:

hyper as in general...what comes to ur mindwhen u see this word....some thing more than normal ...right? so hyper tonic will have higher water potential
so the other will be the opposite!

 

[scouserlfc]

is this in the syllabus??

No didnt find it i still think its somewhere but dont know !

Anyways i dont think this is either in syllabus so we dont need to worry abt it anymore !