Physics
Refrigeration is a process which

Kills bacteria
Slows down the bacterial growth
Plasmolyses the bacteria
Inactivates the bacteria

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Physics
Why are we able to hear short wave broadcasts better than long wave broadcasts ?

Short waves are more energetic than long waves.
Short waves are unaffected by atmospheric disturbances.
By convention, short waves are meant for long distances, whereas long waves are reserved for short distances.
Short wave broadcasts are made by nearby radio stations.

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