Biology; Chemistry; Physics: Post your doubts here!

[ashiqbal]

I guess the egg was an INDIVIDUAL CELL. Granules are present IN the tuber cells, Y was even labelled inside the cell..

nope! not true!



what i have said can be confirmed from this link:
http://sciweb.hfcc.net/biology/jacobs/bio131/cells/plant_cells.htm figure 3

 

[fatikhalid]

i

(i) is correct
(ii) is inversely proportional
(iii) is correct, though i dont know about directly proportional. T increases as I increases!

if T increases as I increases and T increases as R increases so the current and resistance should b directly proportional no??..

 

[ashiqbal]

also see this:

 

[asd]

less hydrogen atoms would mean that less amount of hydrogen gas will be produced, it doesnt affect the rate of reaction!
only factors affecting rate are:
temp
concentration
surface area

the volume, mass or amount of reactants dont affect rate of reaction

dude, see this : 5/1000 * 0.2 = 0.001 moles in P
20/1000 * 0.1= 0.05 moles in Q

This DOES mean that more hydrogen will be produced in Q, but note the no. of moles in the given concentration.
But, volume dilutes the acid. And more moles of H in a diluted acid will take MORE time.

If you take one acid of 0.2 mol/dm3 and other of the same concentration. If the first one has more moles, which will take more time?

 

[fatikhalid]

nope! not true!

View attachment 9856

what i have said can be confirmed from this link:
http://sciweb.hfcc.net/biology/jacobs/bio131/cells/plant_cells.htm figure 3

stop worrying abt wat u guys did wat is done is done u cant undo it so merely hope nd pray that wat u did was right!..

 

[asd]

i
if T increases as I increases and T increases as R increases so the current and resistance should b directly proportional no??..

No.
In V=IR, for the same voltage, I will decrease if you increase R, and vice versa,
And it would be 'R increases as T increases'

 

[fatikhalid]

No.
In V=IR, for the same voltage, I will decrease if you increase R, and vice versa,
And it would be 'R increases as T increases'

and I increases as T incereases too??..

 

[asd]

and I increases as T incereases too??..

No, T increases as I increases.

 

[asd]

K ash, you're right then, but tell me will they cut my marks for magnification ?

 

[ashiqbal]

i
if T increases as I increases and T increases as R increases so the current and resistance should b directly proportional no??..

sorry! i meant to say that I decreases as T increases.
see the first link for exact answers, and other for detailed reading:
http://answers.yahoo.com/question/index?qid=20080306001612AAHhpM2

http://wiki.answers.com/Q/Investiga...rough_a_length_of_wire_and_its_heating_effect

 

[fatikhalid]

No, T increases as I increases.

isn't that the same thing i said??

 

[asd]

isn't that the same thing i said??

No not the same thing, my thing suggests that I is independent, and T is dependent. T increases if I increases. So temperature increase will cause resistance to increase, and consequently, I will decrease. So it's wrong to say I increases with T, It would actually decrease with T.
However, it's appropriate to say that T increases with I.

 

[ashiqbal]

K ash, you're right then, but tell me will they cut my marks for magnification ?

yar , it was for only two marks, so one mark would have been for large realistic drawing, etc. the other would have been for the accurate inside placing, as far as i think.
but for magnification, i dont think they will cut your mark if u have shown both on your drawing and on the figure which measurement you have taken, and completed your answer according to correct formula. U wud easily be awarded the e.c.f. mark for the actual magnification value eg 1000x, 900x, etc. becoz lately they dont actually give actual magnification value in marking scheme.

 

[fatikhalid]

sorry! i meant to say that I decreases as T increases.
see the first link for exact answers, and other for detailed reading:
http://answers.yahoo.com/question/index?qid=20080306001612AAHhpM2

http://wiki.answers.com/Q/Investiga...rough_a_length_of_wire_and_its_heating_effect

a) Current decreases as temperature increases due to the atoms in the material getting more energetic hindering the flow of electrons. this is written there ...:/ v just agreed that T increases as I increases..

 

[asd]

a) Current decreases as temperature increases due to the atoms in the material getting more energetic hindering the flow of electrons. this is written there ...:/ v just agreed that T increases as I increases..

talking to me?

 

[fatikhalid]

No not the same thing, my thing suggests that I is independent, and T is dependent. T increases if I increases. So temperature increase will cause resistance to increase, and consequently, I will decrease. So it's wrong to say I increases with T, It would actually decrease with T.
However, it's appropriate to say that T increases with I.

thanx!!!!!!!!!!!!!...=D

 

[asd]

thanx!!!!!!!!!!!!!...=D

Anytime!

 

[fatikhalid]

talking to me?

hahah no to ashiqbal..=D

 

[fatikhalid]

Anytime!

 

[Dashing Cancerian]

yeah pretty much

haha....