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Why is groundwater warm in winter and cool in summer?

Why is groundwater warm in winter and cool in summer? Winter underground warm water cool summer, why is that? Can groundwater automatically adjust its temperature?...

Zero degrees Celsius and absolute zero

Zero degrees Celsius and absolute zero In everyday life and in manufacturing techniques, people use a thermometer to measure the temperature of an object. For...

Why is the mercury column in the thermocouple unable to automatically lower?

Why is the mercury column in the thermocouple unable to automatically lower? The commonly used mercury thermocouple is made based on the principle of hot,...

Why do thermometers contain alcohol and mercury?

Why do thermometers contain alcohol and mercury? Thermometer is an instrument used to measure the temperature. Commonly used thermometers include: mercury thermometer and alcohol thermometer....

How is the temperature scale determined?

How is the temperature scale determined? We know that how many degrees a thermometer can be used to measure an object's temperature, but how has...

Why can a flute blow out music?

Why can a flute blow out music? Musical instruments such as acmonica, violin, piano etc. can play different kinds of music, we don't feel strange,...

Why is it possible to hear the train sound so far from the ears against the tracks?

unWhy is it possible to hear the train sound so far from the ears against the tracks? To know if a train is coming from...

Why does the sound wave affect human health?

Why does the sound wave affect human health? A few years ago, the French press published a true story: Sapelod is a professor of the...

Who predicted storm winds at sea?

Who predicted storm winds at sea? An expedition ship is running in the sea, scientists are urgently working. One was measuring the depth of the...

Why can ultrasonic waves wash away delicate components?

Why can ultrasonic waves wash away delicate components? As the momentum of science and technology has evolved, the task of cleaning sophisticated components has become...

What is ultrasound?

What is ultrasound? In the nineteenth century, the German scientist, Kran, discovered through experiment that 20 thousand hec was the upper limit of the sound...

Why is there a big shock wave in the air?

Why is there a big shock wave in the air? A supersonic (or over-sounding) airplane is flying at 1100 km / h at low altitude,...
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Why Isn’t The Sky Purple?

Why Isn't The Sky Purple? If you know the explanation for why the sky's blue, you've heard that sunlight is white light composed of many...

How does it rain ?

How does it rain ? Plants need it to grow, animals need it to survive, and the human body needs it to stay hydrated and...

Why does colored light often appear in the sky of the North and South poles?

Why does colored light often appear in the sky of the North and South poles? Colored halos from past to present are very attractive to...

Why do clouds have different colors?

Why do clouds have different colors? You must have seen clouds of many colors. There are fluffy white clouds, dark gray clouds, thanks to gray...