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- 1. Select True or False for the following statements about Heisenberg's Uncertainty Principle True It is not possible to measure simultaneously the x and z positions of a particle 'exactly. FalseIt is not possible to measure simultaneously the x and y momentum components of a particle exactly. FalseIt is possible to measure simultaneously the x position and the x momentum component of a particle exactly. Submit Answer Incorrect. Tries 1/3 Previous Tries Solution part 1 x and z positions are independent. Thus, simultaneous measurement is possible - False part 2 both position and momentum of a particle cannot be simultaneously measured simulataneously accurately but momentum can be measured accurately so x and y momentum components of a particle can be measured exactly. False part 3 it is just opposite of the definition of Heisenberg's Uncertainty Principle. False