physics mcq help needed! urgent!

[highly_ambitious]

which year???

opps sorry m/j 2003 q22.

[ruby92]

O/n 2006
25

[sabrina]

someone plz oct\nov 2002 Q24.

[halosh92]

O/n 2006
25

ok for this question  between X and Y  u will find one full wave that would be 2pie
from X to the beginning of that full wave the distance is 90 degree or pie/2 same thing
and from Y to the end of that full wave the distance is also 90 degrees or pie/2
add all of these together
90 degrees + 90 degrees= pie
pie + 2pie (the middle wave we found out) = 3 pie
therefore C

[halosh92]

could someone plz right down the list of the diameter of the atom value and the nucleus diamater and so on..
thxxx

[ruby92]

diameter of an atom is 10^-10
nucleus is 10^-14

[halosh92]

thx ruby.
could someone give a tip on how to solve projectiles 

[ruby92]

m/j 2005 33 24 16 5 11

[halosh92]

m/j 2005 33 24 16 5 11

Q33) R= L/A
V=A *L
when u double the length
V/L=A
V/2L=A
back to the main equation
R=L/A
R=2L /V/2L
R=4L^2/V
V=A*L
substitute  in the coloured equation
R= 4L^2/A*L
4L/A
L/A=R
therefore  4R so its D

[astarmathsandphysics]

24.1/(700*10^-9)=1.4*10^6
5 2 square=2microseconds
16 max power=max slope which is between 2 and 3 seconds 30/1=30W
11 60m-40m=2m*v
v=10

[superduper2009]

In May/June 2009 how do u do --->
7, 13,20,24

And what is the formula to find a tension in a string... where u have the mass per unit length, the length of the string...etc etc
Thanks in advance..
superduper2009

[3ishakay]

may/june 2005
question 32
plzzzz!!

[ruby92]

may/june 2005
question 32
plzzzz!!

it says 2mm^2 has a current of 10 A. you need to find the no of electrons passing through 2mm^2 in 1 second.
Q=It=10*1=10C
1e has a charge of 1.6*10^-19C
x electrons will have 10C
10*1/1.6*10^-19=6.3*10^23electrons

[3ishakay]

it says 2mm^2 has a current of 10 A. you need to find the no of electrons passing through 2mm^2 in 1 second.
Q=It=10*1=10C
1e has a charge of 1.6*10^-19C
x electrons will have 10C
10*1/1.6*10^-19=6.3*10^23electrons

Thanks a bunch!!! =D

[ruby92]

w/c 

o/n 2005
7 why cant it be C (t1-t2)^2?why t1^2-t2^2