story behind any famous discovery . please need this answer fast
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Answer:
Refrigeration
When was it invented: 1755
Who invented it: William Cullen
How was it invented: Cullen, a Scottish professor, designed a small refrigeration machine in 1755, using a pump to create a partial vacuum over a container of diethyl ether, which then boiled, absorbing heat from the surrounding air. At the time, it had no practical use and Cullen never found a use for his invention.
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Explanation:
The earliest human inventions included stone tools, fire, boats, spears, glue, clothing and other items that we still use today.
Refrigeration
When was it invented: 1755
Who invented it: William Cullen
How was it invented: Cullen, a Scottish professor, designed a small refrigeration machine in 1755, using a pump to create a partial vacuum over a container of diethyl ether, which then boiled, absorbing heat from the surrounding air. At the time, it had no practical use and Cullen never found a use for his invention.
It wasn't until 1805, when US inventor Oliver Evans designed the first refrigeration machine that didn't use liquid and instead used vapor to cool.
In 1834, Jacob Parkins built the first machine for practical refrigeration, becoming the first to hold a patent for the invention. Because of this, he's often considered the father of the refrigerator.
Air conditioner
When was it invented: 1902
Who invented it: Willis Carrier
How was it invented: Genius can strike anywhere. For Willis Carrier, it was a foggy Pittsburgh train platform in 1902. Carrier stared through the mist and realized that he could dry air by passing it through water to create fog. Doing so would make it possible to manufacture air with specific amounts of moisture in it. Within a year, he completed his invention to control humidity – the fundamental building block for modern air conditioning.
The “Father of Air Conditioning,” Carrier’s invention gave rise to numerous industries that power our economy today. Manufacturing of everything from baked goods to wartime supplies was made possible by air conditioning. Air conditioning led directly to summer movie blockbusters as people came to cooled theaters to escape the heat.
The precise control of temperature and humidity made possible by his invention even enabled shopping malls, transatlantic flight, and the computers and servers that power the Internet.
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