Physics Question:

Scientists at Brookhaven National Laboratory invented the forerunner of the PET, which was subsequently found to be well- suited for wide use in institutions around the world for which of the following:

1. metabolic studies and clinical tests
2. deep sea drilling
3. nuclear spallation
4. deep space studies

Answer: A

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Which of the following units is a measure of potential difference:	When a person whirls a rock on the end of a string and maintains it in uniform circular motion, the force exerted on the rock is most accurately referred to as: