According to the Heisenberg uncertainty principle, a) The position of a particle cannot be measured precisely b) The momentum of a particle cannot by measured precisely.

The correct answer is A. According to the Heisenberg uncertainty principle, the position of a particle cannot be measured precisely.

Explanation:

In quantum physics, Heisenberg's uncertainty principle states that for an object it is not possible at the same time to know both position and volume of motion with an arbitrary high degree of accuracy without a definite lower limit for uncertainty; this is in contrast to classical mechanics where each particle has a specific position and a set amount of motion at any given time. The principle is one of the cornerstones of quantum mechanics, and was named by Werner Heisenberg in 1927.

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