Biology; Chemistry; Physics: Post your doubts here!

[Lilly2318]

which

Just did a paper 1 that came last year to my seniors i.e 13 P12 got 39 alhamdullilah
Those chemistry notes really helped a lot!

did u memorize them ...i barely get 30-31. What to do????????/

 

[Lilly2318]

In Q 34 the answHelpo?er is C. Which 3?

Help plz!!!!!!!!!!!!!1

 

[Fate0]

Just did a paper 1 that came last year to my seniors i.e 13 P12 got 39 alhamdullilah
Those chemistry notes really helped a lot!

Which notes :O?

 

[exploded diper]

In Q 34 the answer is C. Which 3?

i think the first third and forth .... guessing..

 

[exploded diper]

This is a concept. Since the temperature is constant, the Ek will remain constant, and since there is a change in state, the Ep changes

but why does ep increase?

 

[Lilly2318]

tell me about
1-senstivity
2-responsiveness
3-linearity
of thermometer

 

[Lilly2318]

tell me about
1-senstivity
2-responsiveness
3-linearity
of thermometer

Ans this and also

Q 18. Full method on how to do t

 

[asadalam]

Which notes :O?

But this time i read each Q carefully.Thats really important,and made equations for the reaction.

 

[funky brat]

Just did a paper 1 that came last year to my seniors i.e 13 P12 got 39 alhamdullilah
Those chemistry notes really helped a lot!

Which notes?

 

[Lilly2318]

HELP IN 37. THE ANS IS A

 

[Lilly2318]

Ans this and also

Q 18. Full method on how to do t

 

[funky brat]

Ans this and also

Q 18. Full method on how to do t

That's very simple. You just have to apply the formula Q= mass*specific heat capacity* temperature change
0.25*4.25*15= 15.93= 16KJ. So that's the answer.

 

[Lilly2318]

That's very simple. You just have to apply the formula Q= mass*specific heat capacity* temperature change
0.25*4.25*15= 15.93= 16KJ. So that's the answer.

and any help here

HELP IN 37. THE ANS IS A

 

[Lilly2318]

Why does emf not depend on resistance

 

[funky brat]

HELP IN 37. THE ANS IS A

What does 0.5 Hz mean?
It means that only half cycle can be completed in one second. So on the screen you see there are 3 half cycles or 1.5 wavelength. So if one half cycle takes 1 second, then 3 half cycles take 3 seconds.

 

[Lilly2318]

tell me about
1-senstivity
2-responsiveness
3-linearity
of thermometer

 

[funky brat]

tell me about
1-senstivity
2-responsiveness
3-linearity
of thermometer

Okay consider two children, both are hurt with a stick with equal force, but one of the kid does not feel it much while the other starts crying. ( lame, but just for the sake of it. ) So you see they have been hurt with equal force but one that starts crying felt it more hence he's more sensitive. In the same way when for equal rise in temperature, in one thermometer the length of mercury thread increases much greater than in the other, so we say such a thermometer is more sensitive than other.
Responsivity is just responding to something, more or less.
Linearity is like for every 1 degree change in temperature the thread moves up by 1cm. Similarly for every 2 degree change it moves by by 2cm.
Hope you get an idea.

 

[funky brat]

Why does emf not depend on resistance

Talking about induced emf?

 

[Lilly2318]

Talking about induced emf?

yes

 

[Lilly2318]

THE ANS IN MS IS B but I THINK IT is C. plz correct me