"Now, we continue to add energy to this mountain, and as energy increases, the particles have no choice but to climb the mountain. Soon the particles form groups, steadily moving upwards and eventually the particles are at the peak, all together, all very excited. It seems now that our particles are very close to each other, very ordered – but still very energetic Our mountain once again has low entropy, but very, very high energy. Our particles are now occupying negative temperatures."
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Is Absolute Zero Absolute?
Right now, as I type this sentence, Earth’s Northern Hemisphere is tilted away from the bright ball of light that is the Sun, and it’s cold here (relatively speaking). Humans have long recorded and measured the temperature of their environment, and for good reason. Keeping constant watch on a thermometer helps us prepare for the potential dangers of cold weather. Take zero degrees Celsius, for instance. At such temperatures, water begins to freeze. In some cases, the pipes that the water runs through malfunction, and then there’s the various life-or-death afflictions that can be brought on by this cold temperature. However, zero degrees Celsius is pretty warm compared to zero degrees on the Fahrenheit scale (after all, water freezes at 32 F).
Yet, neither of these can compare to the temperature known as absolute zero.
Learn about the coldest of the cold, and how scientists surpassed absolute zero, at:
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