PHY 102 EXAM 2 QUESTIONS AND ANSWERS

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. 5 Which of the following is an example of a chemical change? • An ice cube melting. • A sheet of metal being formed into a jewelry box. • A candle burning. • A window breaking. 6 Sulfur dichloride is a cherry-red liquid. Which of the following is true about sulfur dichloride? • It is a covalent molecule with one sulfur atom for each two chlorine atoms. • It is an ionic com