Question

Frank says that quantum mechanics does not apply to baseballs because they do not jump from quantum state to quantum state when being thrown. Francine agrees with him. She says that there is no uncertainty in a baseball's position or momentum. Are they correct, or not, and why

Answer 1

Answer:

They are correct

Explanation:

According to the uncertainty principle, the uncertainty in the position of an object is directly proportional to its De Broglie wavelength.

The De Broglie wavelength of a baseball is about $10^{-34}m$, recall that the diameter of the atom is about to $10^{-10}m$. Thus, the error in simultaneously determining the position and momentum of a baseball is infinitesimally small.