G 11 Study questions

Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. What type of energy is possessed by objects that are primarily affected by the force of gravity and frictional forces? a. radiant energy b. mechanical energy c. thermal energy d. electrical energy ____ 2. What type of energy is possessed by oscillating electric and magnetic fields? a. gravitational energy b. electrical energy c. thermal energy d. radiant energy ____ 3. What type of energy is possessed by materials that are stretched, compressed, or twisted and tend to return to their original shape? a. nuclear energy b. thermal energy c. elastic energy d. chemical energy ____ 4. An electric light bulb performs which energy transformation? a. electrical energy chemical energy + kinetic energy b. chemical energy kinetic energy c. radiant energy chemical energy d. electrical energy radiant energy + thermal energy ____ 5. Photosynthesis is a process that performs which energy transformation? a. radiant energy chemical energy + thermal energy b. thermal energy chemical energy c. chemical energy radiant energy + thermal energy d. thermal energy radiant energy ____ 6. Approximately what percentage of the electrical energy delivered to a typical incandescent light bulb is transformed into radiant energy? a. 65 % b. 25 % c. 5 % d. 50 % ____ 7. Which of the following is an example of a renewable energy resource? a. natural gas b. oil c. coal d. solar energy ____ 8. Which of the following is an example of a non-renewable energy resource? a. nuclear energy b. geothermal energy c. solar energy d. hydroelectricity ____ 9. Which of the following describes the power rating of a typical laptop computer? a. 600–1500 W b. 1200–1500 W c. 20–75 W d. 200–700 W ____ 10. Which of the following describes the power rating of a typical refrigerator? a. 6000–10 000 W b. 600–1500 W c. 100–500 W d. 20–75 W ____ 11. Which term describes the capacity to do work? a. brownout b. efficiency c. energy d. power ____ 12. Which type of energy is possessed by protons and neutrons in atomic nuclei? a. thermal energy b. elastic energy c. nuclear energy d. chemical energy ____ 13. Which term describes applying a force on an object that displaces the object in the direction of the force or a component of the force? a. mechanical work b. energy c. efficiency d. power ____ 14. Which term describes a form of energy an object possesses because of its position in relation to forces in its environment? a. thermal energy b. potential energy c. kinetic energy d. nuclear energy ____ 15. Which term describes a designated level to which objects may fall? a. photovoltaic cell b. reference level c. efficiency d. electrical power grid ____ 16. Which term refers to the sum of kinetic energy and gravitational potential energy? a. efficiency b. nuclear energy c. thermal energy d. mechanical energy ____ 17. In which of the following examples is work being done? a. A child kicks a soccer ball across the field. b. A man pushes against a large crate that will not move. c. A laptop sits on a student’s desk. d. all of the above ____ 18. Which of the following is an example of an object with kinetic energy? a. a diver perched unmoving on the end of a diving board b. a train passing through a tunnel c. a car parked at the top of a steep hill d. all of the above ____ 19. Which of the following is an example of an object with gravitational potential energy? a. a plane lifting off of the runway b. a snowball tumbling down a hill c. a bobsled perched at the top of a run d. all of the above ____ 20. Which process or device is most efficient? a. bicycle b. electric vehicle c. gasoline-powered vehicle d. electric heater ____ 21. How much mechanical work does a woman do on a wheel barrow if she applies a force with a magnitude of 35 N in the forward direction and displaces the wheel barrow 4.0 m in the same direction? a. 140 J b. 39 J c. 4 J d. 35 J ____ 22. How much mechanical work is done on a brick wall if a man pushing with a 250 N force fails to move the wall? a. 0 J b. 250 J c. 125 J d. 2.5 J ____ 23. Which statement(s) about the amount of mechanical work done on an object is (are) true? a. If a force acts on an object in a direction opposite the object’s displacement, the amount of work is a positive value. b. If the force on an object and the object’s displacement are perpendicular, no work is done. c. If the force on an object and the object’s displacement are in the same direction, the amount of work is a negative value. d. all of the above ____ 24. If a descending parachutist has 8.00 kJ of kinetic energy and 225.00 kJ of mechanical energy, how many kJ of gravitational potential energy does the parachutist have? a. 233 b. 1800 c. 217 d. 28.125