The mass of a 30 cm3 stone is 180 g. a. Calculate its density.
b. The stone is broken into two pieces. What is the density of each piece?
c. The smaller piece weighs 80 g. Calculate its volume

Afisherman notices that his boat is moving up and down periodically, owing to waves on the surface of the water. it takes a time of 2.70 s for the boat to travel from its highest point to its lowest, a total distance of 0.700 m. the fisherman sees that the wave crests are spaced a horizontal distance of 6.50 m apart. a. how fast are the waves traveling? b. what is the amplitude a of each wave?