Qualification > Sciences
physics doubt
halosh92:
u guys could u please help me out in this paper:
paper 1 2002 nov.
Q15
q17
q22
q28
q35
q36
please explain in details thxxx aloot
nid404:
--- Quote from: halosh92 on April 29, 2010, 05:41:22 pm ---u guys could u please help me out in this paper:
paper 1 2002 nov.
Q15
q17
q22
q28
q35
q36
please explain in details thxxx aloot
--- End quote ---
that's a lot of them...
will take some time
Saladin:
Let me do the first half.
15: A. Because the diagonal is longer than both the other forces. Thus, it is the hypotenuse. And, the forces are all 90 degress from each other. It is like the end of a box.
17: D. There is no acceleration, so no change in kinetic energy and there for D.
22: A. Solid and liquids have the same densities and the same molecular spacing. The answer is not b, because that would imply that solids have a desnity 1000 times greater than liquids.
28: B. Increasing wavelength means that the chances of interaction decreases, and thus they are further apart.
Nid can do the rest. g2g
nid404:
Q15) A obv resultant vector x and y components
Q17) D no change in velocity, therefore no change in k.e
Q22) Density and molecular spacing in solids and liquids is approx the same...hence A
Q28) lambda= ax/ D where a is the distance between the slits, x the distance between the fringes and D is the distance between the slit and screen. to increase separation that is x..
A-> if f is increased means lambda is decreased as v=flambda.....so this is out(cuz lamda and x are directly proportional)
B->lamda increased ...then x will increase...so B
C->decreasing D will reduce x (directly proportional)
D-> increasing a will reduce x (inversely proportional
Q35) R increases with length... so pointer will be moved to Y. But this will cause I=0...V=IR so V=0
Q36) in the parallel wire with the 5ohm resistors, 2V is split equally, so potential between source and X= 2/3 source and Y= 2X2/3=4/3
difference is 2/3 which is A
nid404:
thanks for offering help dude...but im done... ;)
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