Aball is thrown up into the air. explain what happens to its potential and kinetic energies as it moves up and then back down

The plum pudding model of the atom state that ?

If steel is more dense that lake water, why can a boat float

Amichelson interferometer operating at a 600 nm wavelength has a 3.02-cm-long glass cell in one arm. to begin, the air is pumped out of the cell and mirror m2 is adjusted to produce a bright spot at the center of the interference pattern. then a valve is opened and air is slowly admitted into the cell. the index of refraction of air at 1.00 atm pressure is 1.00028.how many bright-dark-bright fringe shifts are observed as the cell fills with air?