A certain boat traveling on a river displaces a volume of 6.7 m3 of water. (The density of the water is 1000 kg/m3.)a. What is the mass of the water displaced by the boat? b. What is the weight of the boat?2)The pressure of a gas contained in a cylinder with a movable piston is 450 Pa (450 N/m2). The area of the piston is 0.3 m2. What is the magnitude of the force exerted on the piston by the gas
