What happens to the shape of the nucleus of U-235 when a slow neutron hits it?
Ans3. When a slow neutron hits the nucleus of U-235 then the nucleus gets elongated and the distance between neutrons and protons increases. It decreases the nuclear force of attraction between them and the electrostatic force of repulsion becomes more dominant gradually and ultimately the nucleus splits into lighter elements along with emission of three neutrons. Q4. Calculate the power of nuclear reactor if 6 x 1018 fissions take place in one minute. Given that single fission releases 3.2 x 10-11 J of energy. Ans4. The energy released in one fission = 3.2 x 10-11 J of energy Number of fissions in one sec = 6 x 1018/60 = 1 x 1017 fissions Power of the nuclear reactor = (3.2 x 10-11) x (1 x 1017) W = 3.2 x 106 W = 3.2 MW Q5. Give one example each of renewable and non-renewable sources of energy. Ans5. Example of renewable are falling water, tidal energy, sunlight etc. and example of non-renewable sources are coal, natural gas. Q6. Which of the light energy received from the sun has (i)
