Answer
$ 1.4\times 10^{-20}Kg\frac{m}{s}$
Work Step by Step
According to Heisneberg's principle
$\Delta p.\Delta y\geq\frac{h}{2\pi}$
We plug in the known values to obtain:
$\Delta p\times 7.5\times 10^{-15}\geq 1.055\times 10^{-34}$
$\Delta p\geq 1.4\times 10^{-20}Kg\frac{m}{s}$
