Brother how can I paste my photo at my orkut account.

Brother how can I paste my photo at my orkut account.

1.the count of alpha particles decreases from 28800 to 1800 in 48 hrs.the half life of this radioactive element   is ?

2.if a transparent slab of refractive index is u=1.5 and thickness t = 2.5 X 10^-5 m is inserted in front of one of the slits of youngs double slit exp. how much will be the shift in interference pattern?The distance between the slit is 0.5mm and that between slit and screen is 100cm.  (ans 2.5cm)

3.A transparent cube contains a small air bubble.Its apparent  distance is 2cm when seen through one face and 5cm when seen through other face.if refractive index of the material is of the cube is 1.5,then real lenght of the edge of cube must be: ? (ans 10.5cm)

Mr. Krishna Gopal Singh. Thanks a lot for your guidance. Again ,I would like to seek your brilliant views that  what stand the  CBSE should take  for two wrong questions asked out of 35 (in physics )in AIEEE exam 2008.

a) Those who have attended these questions?and

b) not attended these questions.

i will get exactly 294 marks?will i be in top 10.

I ALSO THINK WE  GET BONUS MARKS AS SID SAYS