Biology; Chemistry; Physics: Post your doubts here!

[Rimsa]

They have mass
1/1800 But that is so small so it's ignored.

wese its 1840 in my book

 

[Vogue]

NaOH is soluble in water . Therefore both can be taken as miscible liquids . Fractional Distillation is the only method to separate such liquids

Thank u mutixamza01
i m sorry but i m just curious that hv u already given ur papers?

 

[SalmanPakRocks]

wese its 1864 in my book

Similar is the case with Gravity, though it's 9.8 m/s for free fall but CIE has made it 10. Similarly Electrons mass in the syllabus is 1/1800 in the syllabus.

 

[multixamza01]

Thank u mutixamza01
i m sorry but i m just curious that hv u already given ur papers?

nah , giving them his may/june

 

[Rimsa]

Similar is the case with Gravity, though it's 9.8 m/s for free fall but CIE has made it 10. Similarly Electrons mass in the syllabus is 1/1800 in the syllabus.

hahahaha lolz nahi u were becuming mr accurate so i said maybe i should correct u

 

[bogus]

multixamza01 or bogus.......which one of u am i supposed 2 go with?

1/1840 is the mass of electron ..google it

 

[SalmanPakRocks]

1/1840 is the mass of electron ..google it

Come on! It's not important reallly! :/

 

[beeloooo]

1) what is the safety item used wid pipette?
2)how to obtain pure water from aq. NaOH. a) chromatography b) distillation c) evaporation d) titration
3) wen drawing a graph in either chem or phy ATP, is it necessary to extend the graph beyond the extreme points that r given in the table ( meaning dat if the first point i need to plot is x=30 wen y=20 then do i need to extend the line or curve till origion)???

1) pipette filler

 

[ashiqbal]

angle A will be 40 cuz B and C angle are 70. so apply sine rule.
7.6 (the line BC)/sin(40) = (x+3.8)/ sin(70)

x= 7.31 cm
correct me if its wrong

its correct

 

[ayeshaK]

Can anybody tellme how to find magnification in biology atp ?

 

[Rimsa]

Can anybody tellme how to find magnification in biology atp ?

drawing/ actual ( multiplied by magnification of actual if given)

 

[ayeshaK]

drawing/ actual ( multiplied by magnification of actual if given)

1) if magnification of actual not given then ?
2) and if in any question magnification is given and u have to find actual lenght ? Thankou

 

[Rimsa]

1) if magnification of actual not given then ?
2) and if in any question magnification is given and u have to find actual lenght ? Thankou

1. then just drawing length/ actual length
2. use drawing / magnification

welcome

 

[Rimsa]

can we use digital indicator in titration instead of repeating the titration?

 

[ayeshaK]

1. then just drawing length/ actual length
2. use drawing / magnification

welcome

Thankyou

 

[ayeshaK]

can we use digital indicator in titration instead of repeating the titration?

Titration mostly comes in chem atp where ur already given the indicator and u just have to fond moles and etc but in paper 2 if u r given to write how to prepare soluble salts then you need to mention the repeat of experiment without indicator !

 

[Rimsa]

Titration mostly comes in chem atp where ur already given the indicator and u just have to fond moles and etc but in paper 2 if u r given to write how to prepare soluble salts then you need to mention the repeat of experiment without indicator !

but if we use digital indicator, then? like we wont need to fil up extra lines

 

[ayeshaK]

No but the examiner needs u to write that u shall repeat the experiment without indicator !

 

[Rimsa]

No but the examiner needs u to write that u shall repeat the experiment without indicator !

they torture us like hell

 

[multixamza01]

1/1840 is the mass of electron ..google it

Okay , you win
bogus = 100
multi = O

much better right?