Physics MCQs thread.

[cocospaniel]

It's D.
Take 10 percent of pressure. p0=P(density)hg * 1/10
you will get p0=Phg/10. Then make the height the subject of the formula
so h=10P0/pg

 

[XXXDARKNESSXXXX]

cn u answer my question abt the wave on previous page ?

 

[DeathDealer]

Hey dudex a lil help hea

http://www.xtremepapers.me/CIE/Internat ... 8_qp_1.pdf

Ques 6

 

[DeathDealer]

http://www.xtremepapers.me/CIE/Internat ... 8_qp_1.pdf

Azwel az Ques 24

 

[cocospaniel]

Hey dudex a lil help hea

http://www.xtremepapers.me/CIE/Internat ... 8_qp_1.pdf

Ques 6

it C, when a force is applied perpendicular to the motion, it changes the direction, but speed stays constant. This is like ciruclar motion.

 

[RafaySid]

Hey dudex a lil help hea

http://www.xtremepapers.me/CIE/Internat ... 8_qp_1.pdf

Ques 6

If motion is perp to acc consider a particle launched horizontally in the air. The perp acc is g acting on it. So it's horizontal speed will remain constant (a fact) wheras it's direction will change due to the downward force acting on it.

 

[cocospaniel]

http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9702%20-%20Physics/9702_s08_qp_1.pdf

Azwel az Ques 24

It's C aswell becuase the question said they are the same type of wires therefore the young modulus is the same for both.

 

[cocospaniel]

Can anyone tell me the answer (with explanation) to q1 of the november 2008 paper. It's killing me

 

[ninjas4life]

It's D.
Take 10 percent of pressure. p0=P(density)hg * 1/10
you will get p0=Phg/10. Then make the height the subject of the formula
so h=10P0/pg

but the answer in the mark scheme is a...

 

[cocospaniel]

It's D.
Take 10 percent of pressure. p0=P(density)hg * 1/10
you will get p0=Phg/10. Then make the height the subject of the formula
so h=10P0/pg

but the answer in the mark scheme is a...

My bad, I meant to multiply by 10, then rearrange the formula and you'll get h=P0/10pg. Thanks for pointing that out :Rose:

 

[DeathDealer]

Ques 12......
Friction iz upwardx buh Y Resultant force iz Zero ?

http://www.xtremepapers.me/CIE/Internat ... 8_qp_1.pdf

 

[cocospaniel]

Newton's first law states that when velocity is constant, the resultant force is zero. So it's D

 

[DeathDealer]

Ummmm okkkx

 

[DeathDealer]

Bt where yaaaWr !

 

[DeathDealer]

http://www.xtremepapers.me/CIE/Internat ... 9_qp_1.pdf

Ques 15

 

[cocospaniel]

http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9702%20-%20Physics/9702_s09_qp_1.pdf

Ques 15

It's B
Potential energy = mgh.
When both vessels are equal, h becomes 1/2, m becomes 1/2, g stays the same.

So Potential energy = h/2 * m/2 * g and you'll get mgh/4

 

[Mueez]

http://www.xtremepapers.me/CIE/Internat ... _qp_11.pdf
Q.16 nd Q.22 plzz

 

[DeathDealer]

Ohhhh sorry
It waz easy silly meh
Thanx

 

[DeathDealer]

http://www.xtremepapers.me/CIE/Internat ... _qp_11.pdf

Ques 28

 

[cocospaniel]

http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9702%20-%20Physics/9702_s10_qp_11.pdf
Q.16 nd Q.22 plzz

Q16. It's D, Work Done = Fd.. So efficiency is input/output. therefore mgsi(theta)d/Fd, you cancel d. It's hard to explain this over internet but I hope this help.




Q22. It's C, this website will help you, it has the frequencies and wavelengths for waves http://en.wikibooks.org/wiki/A-level_Ph ... _a_wave%3F