PHY 102 Exam 2 Questions And Answers 100% Correct

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 compound with one sulfur atom for each two chlorine atoms.  It is a covalent molecule with two sulfur atoms for each one chlorine atom.  It is an ionic compound with two sulfur atoms for each one chlorine atom.  It is a covalent molecule with one sulfur atom for each one chlorine atom. 7 Oxygen-16, oxygen-17, and oxygen-18 are:  Different elements.  Different ions.  Different isotopes.  Different materials 8 Which of the following is an example of a compound?  A neon gas.  Table salt crystals.  A sample of soil from the yard.  A bar of gold. 9 An element is characterized by:  The number of protons in the atom.  The mass of the atom.  The number of neutrons in the atom.  The size of the atom. 10 Which of the following is NOT a physical property? Density Flammability Hardness Melting point 11 The primary colors of light are:  Red, blue, and green  Red, yellow, and blue  Magenta, cyan, and yellow  Green, blue, red and yellow 12 In the periodic table, a set of properties repeat from:  element to element.  column to column.  row to row.  group to group. 13 Which of the following statements is true?  Chemical reaction rates vary with the conditions of the reaction, but nuclear decay rates do not.  Nuclear decay rates vary with the conditions of the reaction, but chemical reaction rates do not.  Both chemical reaction rates and nuclear decay rates vary with the conditions of the reaction.  Neither chemical reaction rates nor nuclear decay rates vary with the conditions of the reaction. 14 What is the ultimate source of all electromagnetic waves?  Vibrating molecules  Radio antennas  Light bulbs  Vibrating charged particles  Vibrating atoms 15 Different components of blood can be separated by their densities in a centrifuge. This is because blood is: