physics.....TOUGH QUESTION

[cashem'up]

hey  guys a very tough question q34 wo5.....so damn confusing....chek the gradient is highest at B so shouldnt it be Answer.....but Ans iis C

[halosh92]

hey  guys a very tough question q34 wo5.....so damn confusing....chek the gradient is highest at B so shouldnt it be Answer.....but Ans iis C

gradient is not highest at B its highest at C............draw a tangent and create your own points and check C has the largest gradient....steeper...larger the gradient

[nox_fjmoony]

Hey which year is this? 2005? If so is it the oct/november or the may/june one?

[halosh92]

Hey which year is this? 2005? If so is it the oct/november or the may/june one?

2005 nov

[cashem'up]

but how if u see isnt it steepest at B and also why do u draw tangent and also help me with w06 q21 thanks........

[halosh92]

but how if u see isnt it steepest at B and also why do u draw tangent and also help me with w06 q21 thanks........

no no the higher the line the steeper it is the more is the gradient 
draw a tangent just for ure own convenience so that u get the idea nothin more.

Q21) pressure of water + pressure of oil = total pressure
       PHG +PHG = 17.5*10^6                      (*10^6 because we want to change megametre to metre)
      (1000 * (2000-x) *9. + (830 * x *9. = 17.5*10^6
solve this equation
x= 1260.5
which is nearest to answer D

[nid404]

I'll ask my friend from A2 for nov 05

[cashem'up]

no no the higher the line the steeper it is the more is the gradient 
draw a tangent just for ure own convenience so that u get the idea nothin more.

Q21) pressure of water + pressure of oil = total pressure
       PHG +PHG = 17.5*10^6                      (*10^6 because we want to change megametre to metre)
      (1000 * (2000-x) *9. + (830 * x *9. = 17.5*10^6
solve this equation
x= 1260.5
which is nearest to answer D

hey thanks buddy....pheew.....it helped alot.........
but m still confused wid first one....

[cashem'up]

I'll ask my friend from A2 for nov 05

yea please if u can ......

[tmisterr]

gradient of V-I graph is NOT equal to the resistance unless it is an ohmic resistor at constant temp. I/V is highest at point C, or the gradient of the line from the ORIGIN TO THE POINT C is greatest there for V/I will be smallest.

[nid404]

Could you illustrate that on the graph. I am still not clear. Phy is not too good a subject of mine

[zxcvbnm]

someone please explain question 14 of november 09/12...

[nid404]

Nov 09/12

Q14) momentum before spring was released=0

so momentum after releasing would also be 0

momentum of 2kg trolley= 4kgm/s
momentum of 1kg trolley would be= -4kgm/s  (since sum has to equal to zero)

mv=-4
velocity of 1kg trolley will be 4m/s in the opp direction

total k.e= 1/2 X 2 X 2² + 1/2 X1 X4²
           =4 + 8
           =12J

[zxcvbnm]

Nov 09/12

Q14) momentum before spring was released=0

so momentum after releasing would also be 0

momentum of 2kg trolley= 4kgm/s
momentum of 1kg trolley would be= -4kgm/s  (since sum has to equal to zero)

mv=-4
velocity of 1kg trolley will be 4m/s in the opp direction

total k.e= 1/2 X 2 X 2² + 1/2 X1 X4²
           =4 + 8
           =12J

thanks so much nid!!!! hey if you have some last minute tips for physics, please tell! oh and the formula for phase difference, (2n+1)lambda/2, what does n stand for??? i've totally forgotten it

[nid404]

You're welcome.

Which eqn is this? :S

lol i have no idea