What is the de Broglie wavelength of a neutron that has fallen 1.0 m in a vacuum chamber, starting from rest

In positive numbers less than 1, the zeros between the decimal point and non zero are significant

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?