Water is made to fall drop by drop on the surface of a pool at the rate 120 drops per minute. As aresult, circular ripples are formed on the surface and the distance between the third circle and theseventh circle is 60m. a) Calculate the frequency, period and wavelength. b) Deduce the speed of propagation of the waves on the water surface

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?

Emergent properties of living systems are defined as properties that .

Atruck travels at an average speed of 70 km/hr. if it travels 100 km in the first hour, how far will it go the second hour of a 2 hour trip? if you could also give me the steps that would great.