Physics MCQs thread.

[Arshiful]

can some one anyone please help me Can anyone of you post the force extension graphs of ductile polymeric and brittle matterials and explain them a bit anyone please!!!!!

 

[diwash]

http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9702%20-%20Physics/9702_w10_qp_11.pdf
QUESTION 5 !!
Ufffffffffff..........tryd AwLMOSt mo dn 10 tyme buh ma Ans iz 2mscm^-1 tch
Plzzzzzz Some1 Help me

here
in 1 min(60S) .....3000 revolution.
in 1 s ...............50 revolution so ...f= 50 Hz
now..T =1 /50 ...20 ms
now in the screen of 10 cm wide...only option B can adjust because it is in Milliseconds(ms)...

 

[arlery]

Guyx Q:5 n Q:20 plzzz yaaaaaWR

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

D because

1 Solids are rigid because of the strong forces of attraction between them.
2 Liquids flow because the molecules the forces of attraction among the molecules of liquids are comparatively less...so they have the tendency to flow because of not having definite shape
3 Gases are least dense, particles have no attraction to each other.

 

[DeathDealer]

Guyx Q:5 n Q:20 plzzz yaaaaaWR

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

D because

1 Solids are rigid because of the strong forces of attraction between them.
2 Liquids flow because the molecules the forces of attraction among the molecules of liquids are comparatively less...so they have the tendency to flow because of not having definite shape
3 Gases are least dense, particles have no attraction to each other.

ThanX ALOT mate
n
Q;5 !

 

[Octahedral]

The ans is D why?

 

[histephenson007]

can some one anyone please help me Can anyone of you post the force extension graphs of ductile polymeric and brittle matterials and explain them a bit anyone please!!!!!

They're a bit dirty

 

[jumana94]

@ Deathdealer...here u go
the questions says tht 3000 revolutions take 1 minute=60seconds... we need to find the time for 1 revolution only which will represent 1 pulse or u can imagine it as a wave... in this case 1 revolution needs 0.02 seconds (cross multiplication)... the 0.02 are needed for one revolution, which is 10cm on the screen (see question) so to find the time base u need to find the time for 1cm, which is gonna be 0.002 seconds/cm.... change this to milliseconds you'll find it as 2ms/cm... and this is closest to choice B which is 10ms/cm ....thats it
hope u get it,,,gd luck in your coming examz

 

[MysteRyGiRl]

What is the component of this displacement vector in the direction XY?
A 3.0 km B 4.0 km C 5.0 km D 6.6 km
y is it c? its from oct 2010 varient 2

 

[cocospaniel]

I don't really know how to explain this one, the vertical forces cancel each other out (30-30=0). The horizontal forces don't because hey are in the same direction (20+20=40). So it is non zero. Hope this helps.

 

[Saturation]

Please show the working!

I know it's negative, but how do we find the 1st column!?

 

[ambitious1]

May/June 2003 01 Q.9 the ans is D. but doesn't the distance decrease every impact? ...

 

[Zizu1992]

http://www.xtremepapers.me/CIE/Internat ... 9_qp_1.pdf
please explain question 29

 

[arlery]

Deformation and phases of matter notes.

 

[MysteRyGiRl]

A moving body undergoes uniform acceleration while travelling in a straight line between points
X, Y and Z. The distances XY and YZ are both 40 m. The time to travel from X to Y is 12 s and
from Y to Z is 6.0 s.
What is the acceleration of the body?
A 0.37 m s–2 B 0.49 m s–2 C 0.56 m s–2 D 1.1 m s–2
n dis 1 2 plzzz
^saturation hv da same doubt so cnt help u out sorry

 

[DeathDealer]

@ Deathdealer...here u go
the questions says tht 3000 revolutions take 1 minute=60seconds... we need to find the time for 1 revolution only which will represent 1 pulse or u can imagine it as a wave... in this case 1 revolution needs 0.02 seconds (cross multiplication)... the 0.02 are needed for one revolution, which is 10cm on the screen (see question) so to find the time base u need to find the time for 1cm, which is gonna be 0.002 seconds/cm.... change this to milliseconds you'll find it as 2ms/cm... and this is closest to choice B which is 10ms/cm ....thats it
hope u get it,,,gd luck in your coming examz

Mine waz 2ms Tooo yaaaWR bt Dis Conseption didnt Came in ma Mind About Matchin my Ans to de CloZest Option.........
ThanX Alot Jumana94
Bst Ov Luck 2 yo Too....... :beer:

 

[Octahedral]

How do i get the ans?

 

[histephenson007]

They are in equilibrium, So net force = 0
F= Eq, W = mg
therefore, Eq = mg
therefore, q/m = g/E

 

[Zizu1992]

help me too

 

[Mobeen]

may /june qs7 2009 reply wid reason...plzzz

 

[MysteRyGiRl]

umm any1 wana answer m questions plz??