Science
posted by Akkie .
(a) Given that the energy released per fission of 235U nucleus is 200MeV, calculate (i) the number of fissions and (ii) the amount of energy (in joules) available if 50g of 235U is completely fissioned.
(b) A widespread application of nuclear physics is present in many homes in the form of a smoke detector. Discuss the operation of such a smoke detector.

For the 2nd part of your post, please try some of the following links:
http://search.yahoo.com/search?fr=mcafee&p=smoke+detector+%26+an+application+of+nuclear+physics
Knowing nothing about nuclear fission, try some of the following links for the first part of your post:
http://search.yahoo.com/search?fr=mcafee&p=given+that+energy+released+per+fission+of+235U+nucleus+is+200MeV%2C+calculate+the+number+of+fissions%2C+amount+of+energy+%28in+j+oules%29+available+if+50+g+of+235U+is+completely+fissioned
Sra