Saved Bookmarks
| 1. |
U^(238) decays in 14 steps that together consitute the net reaction ._(92)U^(238)rarr._(82)^(206)Pb+_...+6vecv+8(._(2)^(4)He) (a) Fill in the blank in the above reaction. (b) The atomic masses of U^(238),Pb^(206) and He^(4) are 238.050783u. 205.97449u, and 4.002603u respectively. The energy equivalent of mass of one electron is 0.51 MeV. with this data calculate the Q value of the reaction. (c) U^(238) has a long half life of t=4.47xx10^(9) yr. the other members in the chain reaction have relatively small half lives. As soon as a nucleus of U^(238) decays the remaining steps are completed almost instataneously. with this assumption, calculate the power output from a 100kg block of pure U^(238). the density of U^(238) is 18700 Kg//m^(3). |
|
Answer» (C) 0.01 WATT. |
|