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Questions and Answers
What key aspect of technology does the refrigeration example highlight?
What key aspect of technology does the refrigeration example highlight?
Which statement best represents the nature of technology according to the example?
Which statement best represents the nature of technology according to the example?
Why is merely defining technology as a tangible item inadequate?
Why is merely defining technology as a tangible item inadequate?
What does the text imply about the refrigeration units mentioned?
What does the text imply about the refrigeration units mentioned?
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What conclusion can be drawn regarding technology's impact?
What conclusion can be drawn regarding technology's impact?
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What significant discovery in refrigeration was made in the 1500s?
What significant discovery in refrigeration was made in the 1500s?
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Which refrigerant replaced the more toxic gases in the early twentieth century?
Which refrigerant replaced the more toxic gases in the early twentieth century?
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What kind of refrigeration system involves no motor for operation?
What kind of refrigeration system involves no motor for operation?
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Which feature is commonly found in modern electric refrigerators?
Which feature is commonly found in modern electric refrigerators?
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Why did gas refrigerators not perform well in the marketplace?
Why did gas refrigerators not perform well in the marketplace?
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What was one of the consequences of using chlorofluorocarbons in refrigeration?
What was one of the consequences of using chlorofluorocarbons in refrigeration?
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How did icehouses, which were popular in the 1800s, function to preserve food?
How did icehouses, which were popular in the 1800s, function to preserve food?
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What alternative did the grandmother in the example use alongside her electric refrigerators?
What alternative did the grandmother in the example use alongside her electric refrigerators?
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Study Notes
Refrigeration: A Technology That Changed
- Refrigeration is not a new technology, with early forms known for thousands of years.
- The addition of chemicals like sodium Nitrate to water was discovered in the 1500s, which lowered the temperature.
- Icehouses gained popularity throughout the 1800s, with insulating techniques implemented to slow melting.
- Mechanical refrigeration gained traction in the mid-19th century with methods of compressing gases like ammonia, methyl chloride, and sulfur dioxide.
- In the early 20th century, chlorofluorocarbons (CFCs) such as Freon replaced toxic gases, but later (in the 1970s) were found to have negative effects on the atmosphere.
- Technology is defined as the "disciplined application of knowledge to benefit mankind", however, it can also have negative consequences.
Evolution of Refrigeration Systems
- Gas/propane refrigerators utilize the heating of ammonia for vaporization and subsequent condensation.
- Electric refrigerators, which gained market dominance, employ motors to control expansion and compression.
Technology Impact and Change
- The example of refrigeration highlights the continuous evolution of technology, emphasizing its dynamism.
- The inherent nature of technology is neither inherently good nor bad; its impact depends on its use.
- The societal and market implications of technology need careful planning and evaluation during its development.
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Description
Explore the fascinating history of refrigeration, from its ancient origins to modern practices. This quiz covers significant advancements, including the introduction of chemicals and mechanical systems. Learn about the impact of technology on society and the environment.
