12. [-/2.5 Points] DETAILS SERCP11 9.5.P.019. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A small ferryboat is 3.50 m wide and 6.90 m long. When a loaded truck pulls onto it, the boat sinks an additional 3.60 cm Into the river. What is the weight of the truck? KN Need Help? Read it 13. [-/2.5 Points] DETAILS SERCP11 9.5.P.021. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A hot-air balloon consists of a basket hanging beneath a large envelope filled with hot air. A typical hot-air balloon has a total mass of 519 kg, including passengers in its basket, and holds 2.53 x 10 m of hot air in its envelope. If the ambient air density is 1,2o ky/m , determine the density (in kg/m ) of hot air inside the envelope when the balloon is neutrally buoyant. Neglect the volume of air displaced by the basket and passengers. HINT kg/m3 Need Help? Read It Watch It