1.What is the true density of water? 2.What variables change the density of water? 3. How does water go against the concept of "Thermal Expansion"? Use full sentences that awnser the question? The response should be Fu no copying from internet

Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.