Afisherman notices that wave crests pass the bow of his anchored boat every 4.4 s. he measures the distance between two crests to be 9.5 m. how fast are the waves traveling?

Suppose that three astronomical objects, 1, 2, and 3 are observed to lie on a line, and the distance from object 1 to object 3 is d. object 1 has four times the mass of object 3, and seven times the mass of object 2. find the distance between objects 1 and 2 for which the net force on object 2 is zero.