A person decides to do the marble drop REALLY BIG for extra credit. They build a big ramp and roll a bowling ball off the top of the building 10 meters high. It leaves the building horizontally. If it lands 15 meters from the edge of the building, what was the velocity of the bowling ball when it began to fall?

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?