Measuring temperature and the history of thermometers 베스트 인용
We went from being 'at the mercy' of the heat to being able to harness it, measure it, and use it to build our world; it represents a transition from a subjective feeling to a measurable fact.
이 오디오 레슨은 BeFreed 커뮤니티 멤버가 만들었습니다
I need to understand heat and temperature early discovery’s and measurements method
자주 묻는 질문
Early devices were "open systems," meaning the glass tube was open to the outside air. Because the liquid level was affected by the weight of the atmosphere, the readings would change based on barometric pressure rather than just temperature. A storm rolling in could cause the water level to rise even if the temperature remained exactly the same, making the device a confusing hybrid of a thermometer and a barometer.
In 1654, Ferdinando II de' Medici created the first "closed system" by filling a tube with alcohol and melting the glass tip shut. This isolated the liquid from the outside atmosphere, ensuring that the expansion or contraction of the fluid was caused solely by thermal energy. This breakthrough allowed for the birth of the modern thermometer, as it removed interference from air pressure and provided a reliable way to measure heat alone.
Gabriel Fahrenheit designed his scale for mathematical convenience and precision. He set the freezing point of water at 32 so that there would be exactly 64 degrees—a power of two—between freezing and the human body temperature (which he originally measured as 96). This made the scale easy to divide without calculators. Later, the scale was adjusted so that the boiling point of water was 212, leaving exactly 180 degrees between freezing and boiling, a highly divisible number that simplified scientific calculations.
Absolute Zero is the theoretical temperature where all molecular motion stops, calculated to be -273.15 degrees Celsius. Lord Kelvin and other scientists discovered this point by observing how gases behave; they noticed that as a gas cools, its volume shrinks by a predictable fraction. By plotting this trend on a graph, they found that all gases point toward a single "floor" where volume would theoretically become zero, representing the absolute bottom of the universe's temperature scale.
Temperature measures the speed of molecular vibration, but Joseph Black discovered that heat can also be "hidden" during a phase change. For example, when ice melts, it absorbs a significant amount of energy, but its temperature stays at exactly 32 degrees Fahrenheit until all the ice has turned to water. This "latent heat" is the energy used to break the bonds between molecules rather than increasing their "jiggle" speed or temperature.
더 알아보기
History
History
History isn't just about memorizing dates—it's about understanding the forces that shaped our world and continue to influence our future. This learning plan is perfect for curious minds who want to think critically about the past, students seeking deeper historical understanding, and anyone who wants to recognize patterns that help make sense of current events.
Learn general chemistry
Learn general chemistry
This comprehensive guide bridges the gap between fundamental atomic theory and complex thermodynamic systems. It is ideal for students, aspiring scientists, or curious learners seeking a rigorous yet accessible foundation in the physical sciences.
Theories in physics
Theories in physics
This learning plan provides a comprehensive journey through the evolution of physical theories, from Newton's classical mechanics to the frontiers of modern physics. It's ideal for curious minds seeking to understand how our comprehension of reality has fundamentally shifted over centuries, whether you're a student building scientific foundations, a professional in STEM fields, or an enthusiast passionate about the nature of the universe.
Know more about the past
Know more about the past
This learning plan provides essential historical literacy for anyone seeking to understand how we arrived at our present moment. It's ideal for curious learners who want to move beyond memorizing dates to truly grasping the forces, ideas, and human decisions that shaped civilization—skills that enhance critical thinking in any field or everyday life.
Learn key scientific & historical facts
Learn key scientific & historical facts
Scientific and historical literacy provides crucial context for understanding our world and making informed decisions. This learning plan benefits professionals, students, and curious minds seeking to connect the dots between major discoveries, historical turning points, and their lasting impact on society.
Gain history knowledge
Gain history knowledge
This learning plan provides essential historical literacy for anyone seeking to understand how our world came to be and where it might be heading. It's ideal for curious learners who want to move beyond memorizing dates to truly comprehending the forces, patterns, and pivotal moments that shape human civilization, enabling them to make more informed decisions about present-day issues.
Explore Society, Tech, History & Innovation
Explore Society, Tech, History & Innovation
This learning plan provides a comprehensive overview of how technological milestones have dictated the course of human history and social evolution. It is ideal for curious minds, students of history, and tech professionals looking to understand the broader context of their work.
Emotions & history mix
Emotions & history mix
This learning plan bridges the gap between historical understanding and emotional intelligence, revealing how feelings have been the hidden force behind human progress and conflict. It's ideal for educators, leaders, historians, psychologists, and anyone seeking to understand human behavior through the lens of emotional history. By connecting ancient wisdom with modern neuroscience, learners gain powerful insights into what truly drives human societies and decision-making.
샌프란시스코에서 컬럼비아 대학교 동문들이 만들었습니다
"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."
"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."
"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."
"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."
"Reading used to feel like a chore. Now it’s just part of my lifestyle."
"Feels effortless compared to reading. I’ve finished 6 books this month already."
"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."
"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."
"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"
"It is great for me to learn something from the book without reading it."
"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."
"Makes me feel smarter every time before going to work"
샌프란시스코에서 컬럼비아 대학교 동문들이 만들었습니다
"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."
"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."
"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."
"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."
"Reading used to feel like a chore. Now it’s just part of my lifestyle."
"Feels effortless compared to reading. I’ve finished 6 books this month already."
"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."
"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."
"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"
"It is great for me to learn something from the book without reading it."
"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."
"Makes me feel smarter every time before going to work"
"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."
"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."
"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."
"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."
"Reading used to feel like a chore. Now it’s just part of my lifestyle."
"Feels effortless compared to reading. I’ve finished 6 books this month already."
"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."
"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."
"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"
"It is great for me to learn something from the book without reading it."
"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."
"Makes me feel smarter every time before going to work"
"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."
"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."
"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."
"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."
"Reading used to feel like a chore. Now it’s just part of my lifestyle."
"Feels effortless compared to reading. I’ve finished 6 books this month already."
"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."
"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."
"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"
"It is great for me to learn something from the book without reading it."
"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."
"Makes me feel smarter every time before going to work"
