Question

Heisenberg uncertainty principle is not valid for :

• A. moving electrons
• B. motor car
• C. stationary particles
• D. all of the above

Answer 1

Answer: (B), (C)

motor car
stationary particles

According to Heisenberg $\Delta H\times \Delta X=\frac{h}{2\pi }$. Where $\Delta H=$ change in moentum $\Delta X=$ change in position and h = planck's constant

For motor car mass will big enough to observe anything because h(planck's constant) is very small.

And for stationary particles momentum will be zero.

so, Answer is B&C