Which of the following statements is correct?

If the uncertainty in position and momentum are equal,then the uncertainty in velocity is .......

$x$ and $y$ are two moving particles. The uncertainty in the momentum of $x$ is half the uncertainty in the momentum of $y$. If the uncertainty in the position of particle $x$ is $0.05 \ \mathring{A}$,then the uncertainty in the position of particle $y$ is = .......

Who developed the fundamental equation of quantum mechanics?

If $\Delta x$ is the uncertainty in position and $\Delta v$ is the uncertainty in velocity of a particle are equal,the correct expression for uncertainty in momentum for the same particle is

The uncertainty principle and the concept of wave nature of matter were proposed by ...... and ...... respectively.