We can understand why 235u is readily fissionable, and 238u is not, by usingthe following calculation.
(a) find the energy difference between 235u + nand 236u. we can regard this as the "excitation energy" of 236u.
(b) repeat (a) for 238u + nand 239u.(c) (2 pts) comparing your results for (a) and (b), explain why 235u will fission with very low energy neutrons, while 238u requires fast neutrons of 1 to 2mev of energy to fission.

answer; natural resources;

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.