Physics: Post your doubts here!

[ZaqZainab]

Question bhejho, me question hi bhul gaya ._.

http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_w02_qp_1.pdf
Q14

 

[Thought blocker]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w02_qp_1.pdf
Q14

Abhi tak solve ni hua kiya ?
Hadi Murtaza help kardey bhai Zainab sis ko ._.
And for that Q11 of nov 2003 answer is A coz :

 

[ZaqZainab]

Abhi tak solve ni hua kiya ?
Hadi Murtaza help kardey bhai Zainab sis ko ._.
And for that Q11 of nov 2003 answer is A coz :

but the answer is not A
this time i saw it properly

 

[Thought blocker]

but the answer is not A
this time i saw it properly

?

 

[Thought blocker]

but the answer is not A
this time i saw it properly

Abhi tak solve ni hua kiya ?
Hadi Murtaza help kardey bhai Zainab sis ko ._.
And for that Q11 of nov 2003 answer is A coz :

._. Ye post ni dekhi ._. ?

 

[ZaqZainab]

?

?? the answer is D for the question you just answered

 

[Thought blocker]

Oh, than I don't know

 

[Thought blocker]

Zainab is this right ? M not sure..
momentum change = m * change in velocity
initial velocity is = u
final is = -u (-ve sign is due to direction change)
change is [u-(-u)]
change is 2u
momentum change is 2mu

 

[ZaqZainab]

Zainab is this right ? M not sure..
momentum change = m * change in velocity
initial velocity is = u
final is = -u (-ve sign is due to direction change)
change is [u-(-u)]
change is 2u
momentum change is 2mu

there makes more sense

 

[Thought blocker]

there makes more sense

- sign q ni hai :/ ?

 

[ZaqZainab]

- sign q ni hai :/ ?

what?
Change in momentum = Final momentum-Initial momentum
=mv-mu
here v=-u
=-mu-mu
-2mu

 

[Thought blocker]

what?
Change in momentum = Final momentum-Initial momentum
=mv-mu
here v=-u
=-mu-mu
-2mu

(Y)

 

[ZaqZainab]

(Y)

my brain started working
You guys
kitkat <3 :P Kamihus sagar65265 and you are Amazing
Thank you so much

 

[Thought blocker]

my brain started working
You guys
kitkat <3 :P Kamihus sagar65265 and you are Amazing
Thank you so much

Arey, wo to simple tha, I was asking something else, but I got that one too
YOU ARE ALSO AMAZING KID!
WC SO MUCh

 

[kitkat <3 :P]

my brain started working
You guys
kitkat <3 :P Kamihus sagar65265 and you are Amazing
Thank you so much

no prob

 

[not.maria]

kindly someone help me with Q9 mj13 qp12
how to we solve this?
the ans is A

 

[Thought blocker]

View attachment 43738
kindly someone help me with Q9 mj13 qp12
how to we solve this?
the ans is A

try to convert things into SI units en make a formula of Kg/S
multiplying Speed , density , area gives u Mass /second units thats all wat u need!! Multiply all those quantities.......then put formula
F=ma
F=m*(v-u)/t (here just focus mass per unit time ,the answer u had before)
V (v=33)
f=475.2*(33) =15681.6 approx answer!!!

P.S - Answer is D :/

 

[Mohammad Farzanullah]

 

[Thought blocker]

View attachment 43750

Consider formula : V = E - Ir, So we need quantity is Ir that is I(current) and r(internal resistance) so option C

 

[Mohammad Farzanullah]

Consider formula : V = E - Ir, So we need quantity is Ir that is I(current) and r(internal resistance) so option C

But we also need to know the battery's EMF considering this formula!