Ans: becomes heat Link to: 17.4 Difficulty: Easy 41. The following concepts are relevant to the Earth’s energy balance. Define each: (a) Albedo: (b) Electromagnetic Spectrum: (c) Earthshine: (d) Negative Feedback: Ans: a. albedo reflectivity of the planetary surface – b. electromagnetic spectrum the full range of wavelengths of the electromagnetic – spectrum c. earthshine heat energy radiated from the Earth to space – d. negative feedback a mechanism by which an initial stimulus tends to damp itself – out a mechanism that tends to stabilize a system – Link to: Chap. 17 Difficulty: Medium 42. Fundamental characteristics of energy are reflected in the first and second laws of thermodynamics (energy laws). Define these two laws. Ans: conservation of energy, entropy Link to: 17.3 Difficulty: Easy 43. Energy for most of the mechanisms of human society comes from heat engines of different types. Name three broad classes of environmental effects of heat engines. Ans: acid rain thermal pollution urban smog potential global climate change Link to: 17.3 Difficulty: Medium 44. Give an example of cogeneration. Ans: An example of cogeneration is a natural gas combined power plant that produces electricity in two ways: gas cycle and steam cycle. In the gas cycle gas is burned to produce electricity, while in the steam cycle, hot exhaust from the gas turbine is used to create steam
Ans: becomes heat Link to: 17.4 Difficulty: Easy 41. The following concepts are relevant to the Earth’s energy balance. Define each: (a) Albedo: (b) Electromagnetic Spectrum: (c) Earthshine: (d) Negative Feedback: Ans: a. albedo – reflectivity of the planetary surface b. electromagnetic spectrum – the full range of wavelengths of the electromagnetic spectrum c. earthshine – heat energy radiated from the Earth to space d. negative feedback – a mechanism by which an initial stimulus tends to damp itself out – a mechanism that tends to stabilize a system Link to: Chap. 17 Difficulty: Medium 42. Fundamental characteristics of energy are reflected in the first and second laws of thermodynamics (energy laws). Define these two laws. Ans: conservation of energy, entropy Link to: 17.3 Difficulty: Easy 43. Energy for most of the mechanisms of human society comes from heat engines of different types. Name three broad classes of environmental effects of heat engines. Ans: acid rain thermal pollution urban smog potential global climate change Link to: 17.3 Difficulty: Medium 44. Give an example of cogeneration. Ans: An example of cogeneration is a natural gas combined power plant that produces electricity in two ways: gas cycle and steam cycle. In the gas cycle gas is burned to produce electricity, while in the steam cycle, hot exhaust from the gas turbine is used to create steam
APES-7-Unit-7-Review-Questions-2eqkw2b.docx