3
PHY 102 Exam 2.
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
, 3
• 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.
PHY 102 Exam 2.
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
, 3
• 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.
