Niagara falls is a set of very large waterfalls located on the border between new york and ontario, canada. over 200,000 cubic feet of fast-moving water falls approximately 180 feet every second. water at the top of the falls possesses a. kinetic energy and gravitational potential energy. b. only gravitational potential energy. c. only kinetic energy. d. neither gravitational potential energy nor kinetic energy.

Which of the following is the phase that results when the moon is on the opposite side of the earth from the sun? a. quarter moon b. crescent moon c. new moon d. full moon

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?

Why does gravity have a lesser than grater effect on higher altitudes?