Physics: electrical energy

Which process supplies the energy converted to electrical energy in a nuclear power plant?  The release of steam from underground hot springs.  The fusion of small nuclei.  The fission of large nuclei.  The combustion of natural gas.  The burning of coal. 2 An explosion occurs 3400m away. Given that sound travels at 340 m/s, how long will it take for the sound of the explosion to reach you?  less than a second  3 seconds  10 seconds  100 seconds 3 When ethanol (empirical formula C2H6O) burns, it combines with oxygen and forms carbon dioxide and water. Which of the following is the balanced chemical reaction for the burning of ethanol?  C2H6O + O2 → CO2 + H2O  C2H6O + 2 O2 → 2 CO2 + 3 H2O  2 C2H6O + 3 O2 → 4 CO2 + 6 H2O  C2H6O + 3 O2 → 2 CO2 + 3 H2O  C2H6O + 2 O2 → 2 CO2 + 2 H2O  4. When two light nuclei fuse together, mass  Is conserved.  Is converted to energy.  Is created from energy.  Is increased.