Suppose a chain that is 20 m long hangs over the side of a building. Find the work required to lift the chain to the top of the building if the chain has a linear density of 5 kg/m. against gravity

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?

Which of the the following are examples of projectile motion of both projectile motion and two dimensional motion

What is the relationship between wavelength of light and the quantity of energy per photon?