What is the momentum of a 73 person running with a speed of 2 m/s

What are similarities and differences between refraction, reflection, diffraction and absorption?

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

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?