/u/educandario's posts in /r/askscience

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If I collect a sample of cheek cells for DNA analysis and the patient ate meat, the cow's DNA can be present on the analysis and can be a source of interference?

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If the speed of sound in water is about 1400m/s can a vehicle or object be fast enough to be supersonic in water? How water will act in this condition?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
If I collect a sample of cheek cells for DNA analysis and the patient ate meat, the cow's DNA can be present on the analysis and can be a source of interference?	1
If the speed of sound in water is about 1400m/s can a vehicle or object be fast enough to be supersonic in water? How water will act in this condition?	1