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The submarine will most likely find data that shows the highest pressure data and the lowest temperature data (unless of course it's near a hydrothermal vent). This is because due to the depth there's a lot more water above it putting a lot of pressure on the sub, and very little sunlight to heat up the water.
Answer:
I don't know. but a human can swim inside an blue whales main heart aterary comfortably.
Explanation:
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