Physics: Post your doubts here!

[Lyfroker]

Because the gravitational force provides the centripental force..

N y do we need centripetal force? :S

 

[Albert Einstein]

thats the problem i cant expand the bracket there's where i fail can u please expand the brackets

Of course u will fail

becoz when u replace the initial velocity (gt1) in the eqns S=...
u must replace the time taken also that is gt1(t1-t2)
ur mistake is u replace the initial velocity,u by gt1 and forgot the time taken for the distance travelled.
Now u found ur mistake !!!!!!!!

 

[Albert Einstein]

N y do we need centripetal force? :S

Because centripental force is not a force by itself..but provided by another force for e,g tension friction..etc in zis example is gravitational force

 

[snowbrood]

Of course u will fail

becoz when u replace the initial velocity (gt1) in the eqns S=...
u must replace the time taken also that is gt1(t1-t2)
ur mistake is u replace the initial velocity,u by gt1 and forgot the time taken for the distance travelled.
Now u found ur mistake !!!!!!!!

please give me the correct solution i am damn confused tom is my test please

 

[Albert Einstein]

please give me the correct solution i am damn confused tom is my test please

 

[Albert Einstein]

 

[snowbrood]

thank u einstein love u friend thanks a ton

 

[snowbrood]

u deserve million likes

 

[Lyfroker]

Because centripental force is not a force by itself..but provided by another force for e,g tension friction..etc in zis example is gravitational force

Ok thnx

 

[Lyfroker]

An aircraft is used on a short horizontal flight on its journey from A to B the resultant velocity of the aircraft is 15m/s in a direction 60 degrees east of north and the wind velocity is 7.5m/s due north.
Show that for the aircraft to travel from A to B it should be pointed due east.

Albert Einstein cn u solve this one too plz

 

[Albert Einstein]

Albert Einstein cn u solve this one too plz

I've nt done relative velocity..its nt part of my syllabus sorry

 

[Lyfroker]

I've nt done relative velocity..its nt part of my syllabus sorry

It's ok

 

[yumichikabyakuya renji]

someone plz help with oct/nov 07 p1 Q37
http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w07_qp_1.pdf
the answer is C

and does anyone of you has the variable 2 for jun 09? i mean jun 09 p22... plz i really need it :O

 

[Albert Einstein]

someone plz help with oct/nov 07 p1 Q37
http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w07_qp_1.pdf
the answer is C

and does anyone of you has the variable 2 for jun 09? i mean jun 09 p22... plz i really need it :O

Hehe..this question i've tried it by elimination and it wrked out and such types of question often appear in paper 2 as well...
Refering to my notes i've found during nuclear reaction Mass and energy, nuleon number, charge, isospine, momentum, proton number is conserved so by eliminaton i've found neutron number as answer...

 

[Albert Einstein]

Hehe..this question i've tried it by elimination and it wrked out and such types of question often appear in paper 2 as well...
Refering to my notes i've found during nuclear reaction Mass and energy, nuleon number, charge, isospine, momentum, proton number is conserved so by eliminaton i've found neutron number as answer...

Here it is http://www.miniphysics.com/2010/12/nuclear-reactions.html

 

[Farru]

A point source of sound emits energy equally in all directions at a constant rate and a person 8 m from the source listens. After a while, the intensity of the source is halved. If the person wishes the sound to seem as loud as before, how far should he be now from the source? rep asap!

 

[Albert Einstein]

someone plz help with oct/nov 07 p1 Q37
http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w07_qp_1.pdf
the answer is C

and does anyone of you has the variable 2 for jun 09? i mean jun 09 p22... plz i really need it :O

Ive got it...during a nuclear reaction the neutron is converted into proton and electron therefore the neutron number is not conserved

 

[yumichikabyakuya renji]

Here it is http://www.miniphysics.com/2010/12/nuclear-reactions.html

really helpful thXx

 

[A_K_D]

Can somebody do question 3di) from the May June 2011 paper variant 23?

It would be very helpful... I've been working on it but no matter how hard I think I can't get the answer

Thank you for your Time

 

[Albert Einstein]

Can somebody do question 3di) from the May June 2011 paper variant 23?

It would be very helpful... I've been working on it but no matter how hard I think I can't get the answer

Thank you for your Time

Here u are....