Physics: Post your doubts here!

[Albert Einstein]

OMG ! You are genius !
Thanks

U r welkum

 

[raamish]

ok

You're right - I forgot about that.

They only produce constructive interference then. Looks like I'm forgetting some of my AS stuff already.

 

[Lyfroker]

The earth takes one year to orbit the sun at a distance of 1.5*10^11m. Calculate it's speed. Explain why this is it's average speed and not it's velocity.
Can someone explain this plzzzzzzzz

 

[Silent Hunter]

The earth takes one year to orbit the sun at a distance of 1.5*10^11m. Calculate it's speed. Explain why this is it's average speed and not it's velocity.
Can someone explain this plzzzzzzzz

maybe cuz it comes back to its original position after a complete round and displacement (in the case of velocity) becomes zero.
i think so

 

[Minato112]

The earth takes one year to orbit the sun at a distance of 1.5*10^11m. Calculate it's speed. Explain why this is it's average speed and not it's velocity.
Can someone explain this plzzzzzzzz

maybe cuz it comes back to its original position after a complete round and displacement (in the case of velocity) becomes zero.
i think so

I think Silent Hunter is right cuz' I thought so 2.
During an orbit, the earth returns to its original position, which makes displacement 0. There no displacement ---> no velocity.

 

[Lyfroker]

maybe cuz it comes back to its original position after a complete round and displacement (in the case of velocity) becomes zero.
i think so

I think Silent Hunter is right cuz' I thought so 2.
During an orbit, the earth returns to its original position, which makes displacement 0. There no displacement ---> no velocity.

Yes that's correct but cn u calculate the speed

 

[yumichikabyakuya renji]

The answers for MCQ are in this examiner report

thXx i didn't quite understand Q10, 13 18 and 35, cud u help me with these? i looked for it from here: http://xtremepapers.com/community/threads/as-physics-p1-mcqs-yearly-only.17330/page-9#post-330586

bt still i didn't understand

 

[Lyfroker]

The earth takes one year to orbit the sun at a distance of 1.5*10^11m. Calculate it's speed.
Plzzzz help

 

[elbeyon]

Can any one explain me question no. 17 and 20 of May/June 2011 Paper 11.
Question Paper : http://www.xtremepapers.com/papers/...nd AS Level/Physics (9702)/9702_s11_qp_12.pdf
Marking Scheme : http://www.xtremepapers.com/papers/...nd AS Level/Physics (9702)/9702_s11_ms_12.pdf

Thanks.

 

[falcon678]

salam guys...wantd to ask where to get some written material for the first 2 topics in syllabus for 2o14 phy...!

 

[Lyfroker]

The earth takes one year to orbit the sun at a distance of 1.5*10^11m. Calculate it's speed.
Plzzzz help

Albert Einstein plz cn u help me

 

[Albert Einstein]

Albert Einstein plz cn u help me

What is the mass of the sun ??

 

[snowbrood]

ans is D can u guys give a solution plz

 

[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.

 

[Lyfroker]

What is the mass of the sun ??

Mass?

 

[Albert Einstein]

Mass?

Wepss

 

[snowbrood]

can u guys give the solution ans is D

 

[Lyfroker]

Wepss

What do u mean?

 

[snowbrood]

i reached to S=gt1 + 1/2*g*(t2-t1)2

 

[Albert Einstein]

Wepss

well i got it

Force garvitational= force centripental

GMm/r^2 = mv^2/r


Use M= 1.9891 *10^30
r=1.5*10^11

and find v..wer z prob ??