Physics Paper 12 How was it

[leosco1995]

i guess they didn't ask about the time that the light takes to reach the eyes, they were just talking about the time to reach the wall

I am not sure about the exact wording of the question, but I read it more than once and it mentioned the time it took for be reflected also.

 

[leosco1995]

are u sure about that? i mean confirm?

Yeah it was 0.12 J.

 

[BILALrox01]

wat was the ans to the question of the sound wave between x nd y? 33cm nd 330ms-2 one?

 

[Taimoor93]

wat was the ans to the question of the sound wave between x nd y? 33cm nd 330ms-2 one?

D

 

[BILALrox01]

D

wat was D?

 

[MOMO123123]

D

i put D but i think im wrong , 33 is the distance bet 2 maximams that means half wavelength not wavelength, so frequency=330/(33x2x10^-2) so period=2 ms.. the D option was period=1 ms i think :S

 

[Silent Hunter]

33 is the distance bet 2 maximams that means half wavelength not wavelength, so frequency=330/(33x2x10^-2) so period=2 ms..

i think this method is correct..... but i am also not sure what was the option for this one

 

[MOMO123123]

i think this method is correct..... but i am also not sure what was the option for this one

neither do i :d but i know i used wavelength is 33cm and got the choice D, so its not D.. plz correct me if im wrong

 

[Ahmed Tariq]

What was the correct answer to the red and green lamps and black wire question? And anybody remember the question in which the displacement of the particle was asked?

 

[Mattman]

No it said distance between maximum and minimum, so it's lambda over four. A is the awnser.
Also how did you guys get 0.12??? I did area of trapezium and I got 0.8

 

[Prince III]

You Missed the question on the projectile one Answer was
(D) total momentum remains the same

 

[Prince III]

No it said distance between maximum and minimum, so it's lambda over four. A is the awnser.
Also how did you guys get 0.12??? I did area of trapezium and I got 0.8

Yes it was 0.12J for sure

 

[Idolfanatic95]

bro can u please Pm me the list of all the questions that you made....i cant actually believe it that u remember most of em!!!

can u please pm me the lissst pleseaseaseaseaseaseaseas

pm me the list too if u can

 

[Mattman]

Yes it was 0.12J for sure

How? I did 0.5(25+20)7 and I got about 8

 

[Idolfanatic95]

Yeah that was c I think
D was like horizontal component=Q or something
Can anyone tell me what the momentum question was?

Momentum ques was D for sure.

 

[Mattman]

Momentum ques was D for sure.

yeah what was it again?

 

[Ahmed Tariq]

You Missed the question on the projectile one Answer was
(D) total momentum remains the same

Which question was that?

 

[floral123]

k dude u knw da friction is 6N
so force-friction=resultant (ma)
force= 2*10=20N friction=6N total mass is 8+2=10N substitue in da eqn
20-6=10a
a=1.4ms-2
hope u get it..

u wont do the total mass....the mass of only 8 kg i think...coz forward force is being applied on that...

 

[Arslanjaved]

How? I did 0.5(25+20)7 and I got about 8

not a trapezium
there was a curve after straight line

 

[Princess 123]

What was the correct answer to the red and green lamps and black wire question? And anybody remember the question in which the displacement of the particle was asked?

The answer for the lamps related question was option D for sure..