an object of higher temperature radiate infrared rays as a way to decrease the temperature. how a molecule produce a electromagnetic wave? in atoms electromagnetic radiation is caused by electrons. what is responsible in molecules?
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cosmology - The difference between comoving and proper distances in defining the observable universe"The radius of the observable universe is estimated to be about 46.5 Gly." If I understand correctly, it means the most distant ob...
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It is always told as a fact without explaining the reason. Why do two objects get charged by rubbing? Why one object get negative charge and...
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Everyone always talks about the efficiency of their appliances. I was wondering if everything was 100% efficient at heating its surroundings...
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