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Cold slows the rate of metabolic reactions in the body (e.g. pulse, digestion, etc.). When jumping into cold water, the heart rate can slow to a dangerous level while having to pump harder to keep the body warm. The body knows what is dangerous and sends signals to the brain when something could jeopardize safety.

Jumping into cold water would cause the same amount of fear as boiling water.

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14y ago

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Is it ok to plunge a hot test tube in to cold water to cool it off?

No, it is not advisable to plunge a hot test tube into cold water. This rapid temperature change can cause the glass to shatter due to thermal stress. Instead, allow the test tube to cool gradually or use a water bath at a moderate temperature to ensure safe cooling.


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The frigidarium was a room for a cold-plunge bath. It had a pool with cold water.


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shocking.


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What were cold baths called in Rome?

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