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The amount of uranium within nuclear fuel rods is enough to sustain a chain reaction but is less than the critical mass necessary for the reaction to become explosive.
Answer:
The secretory portion is found in the dermis, the middle layer of the skin. Sometimes it's also found in the hypodermis, the deepest layer of our skin. The secretory portion of a sweat gland is a twisted and coiled tube that has an opening at its very top.
Explanation:
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